diff --git a/docs/notes/Java 基础.md b/docs/notes/Java 基础.md
index 409c1e75..e81b46a7 100644
--- a/docs/notes/Java 基础.md	
+++ b/docs/notes/Java 基础.md	
@@ -1420,7 +1420,6 @@ Java 注解是附加在代码中的一些元信息，用于一些工具在编译
 - Java 不支持多重继承，只能通过实现多个接口来达到相同目的，而 C++ 支持多重继承。
 - Java 不支持操作符重载，虽然可以对两个 String 对象执行加法运算，但是这是语言内置支持的操作，不属于操作符重载，而 C++ 可以。
 - Java 的 goto 是保留字，但是不可用，C++ 可以使用 goto。
-- Java 不支持条件编译，C++ 通过 #ifdef #ifndef 等预处理命令从而实现条件编译。
 
 [What are the main differences between Java and C++?](http://cs-fundamentals.com/tech-interview/java/differences-between-java-and-cpp.php)
 
diff --git a/docs/notes/Leetcode 题解 - 位运算.md b/docs/notes/Leetcode 题解 - 位运算.md
index d4c659b7..a89999ad 100644
--- a/docs/notes/Leetcode 题解 - 位运算.md	
+++ b/docs/notes/Leetcode 题解 - 位运算.md	
@@ -47,9 +47,9 @@ x ^ x = 0       x & x = x       x | x = x
 
 要得到只有第 i 位为 1 的 mask，将 1 向左移动 i-1 位即可，1<<(i-1) 。例如 1<<4 得到只有第 5 位为 1 的 mask ：00010000。
 
-要得到 1 到 i 位为 1 的 mask，1<<(i+1)-1 即可，例如将 1<<(4+1)-1 = 00010000-1 = 00001111。
+要得到 1 到 i 位为 1 的 mask，(1<<i)-1 即可，例如将 (1<<4)-1 = 00010000-1 = 00001111。
 
-要得到 1 到 i 位为 0 的 mask，只需将 1 到 i 位为 1 的 mask 取反，即 \~(1<<(i+1)-1)。
+要得到 1 到 i 位为 0 的 mask，只需将 1 到 i 位为 1 的 mask 取反，即 \~((1<<i)-1)。
 
 **Java 中的位操作** 
 
diff --git a/docs/notes/Leetcode 题解 - 动态规划.md b/docs/notes/Leetcode 题解 - 动态规划.md
index 6cf5449b..fd51bf13 100644
--- a/docs/notes/Leetcode 题解 - 动态规划.md	
+++ b/docs/notes/Leetcode 题解 - 动态规划.md	
@@ -869,18 +869,20 @@ return -1.
 
 ```java
 public int coinChange(int[] coins, int amount) {
-public int change(int amount, int[] coins) {
-    if (coins == null) {
-        return 0;
-    }
     int[] dp = new int[amount + 1];
-    dp[0] = 1;
     for (int coin : coins) {
-        for (int i = coin; i <= amount; i++) {
-            dp[i] += dp[i - coin];
+        for (int i = coin; i <= amount; i++) { //将逆序遍历改为正序遍历
+            if (i == coin) {
+                dp[i] = 1;
+            } else if (dp[i] == 0 && dp[i - coin] != 0) {
+                dp[i] = dp[i - coin] + 1;
+
+            } else if (dp[i - coin] != 0) {
+                dp[i] = Math.min(dp[i], dp[i - coin] + 1);
+            }
         }
     }
-    return dp[amount];
+    return dp[amount] == 0 ? -1 : dp[amount];
 }
 ```
 
@@ -902,6 +904,9 @@ Explanation: there are four ways to make up the amount:
 
 ```java
 public int change(int amount, int[] coins) {
+    if (amount == 0 || coins == null || coins.length == 0) {
+        return 0;
+    }
     int[] dp = new int[amount + 1];
     dp[0] = 1;
     for (int coin : coins) {
@@ -999,8 +1004,7 @@ public int combinationSum4(int[] nums, int target) {
 
 题目描述：交易之后需要有一天的冷却时间。
 
-<div align="center"> <img src="https://cs-notes-1256109796.cos.ap-guangzhou.myqcloud.com/83acbb02-872a-4178-b22a-c89c3cb60263.jpg" width="300px"> </div><br>
-
+<div align="center"> <img src="https://cs-notes-1256109796.cos.ap-guangzhou.myqcloud.com/ffd96b99-8009-487c-8e98-11c9d44ef14f.png" width="300px"> </div><br>
 
 ```java
 public int maxProfit(int[] prices) {
diff --git a/docs/notes/Leetcode 题解 - 搜索.md b/docs/notes/Leetcode 题解 - 搜索.md
index 4fd9504b..b884a189 100644
--- a/docs/notes/Leetcode 题解 - 搜索.md	
+++ b/docs/notes/Leetcode 题解 - 搜索.md	
@@ -61,6 +61,8 @@
 
 ## 1. 计算在网格中从原点到特定点的最短路径长度
 
+[1091. Shortest Path in Binary Matrix(Medium)](https://leetcode.com/problems/shortest-path-in-binary-matrix/)
+
 ```html
 [[1,1,0,1],
  [1,0,1,0],
@@ -68,12 +70,12 @@
  [1,0,1,1]]
 ```
 
-题目描述：1 表示可以经过某个位置，求解从 (0, 0) 位置到 (tr, tc) 位置的最短路径长度。
+题目描述：0 表示可以经过某个位置，求解从左上角到右下角的最短路径长度。
 
 ```java
-public int minPathLength(int[][] grids, int tr, int tc) {
-    final int[][] direction = {{1, 0}, {-1, 0}, {0, 1}, {0, -1}};
-    final int m = grids.length, n = grids[0].length;
+public int shortestPathBinaryMatrix(int[][] grids) {
+    int[][] direction = {{1, -1}, {1, 0}, {1, 1}, {0, -1}, {0, 1}, {-1, -1}, {-1, 0}, {-1, 1}};
+    int m = grids.length, n = grids[0].length;
     Queue<Pair<Integer, Integer>> queue = new LinkedList<>();
     queue.add(new Pair<>(0, 0));
     int pathLength = 0;
@@ -83,14 +85,14 @@ public int minPathLength(int[][] grids, int tr, int tc) {
         while (size-- > 0) {
             Pair<Integer, Integer> cur = queue.poll();
             int cr = cur.getKey(), cc = cur.getValue();
-            grids[cr][cc] = 0; // 标记
+            grids[cr][cc] = 1; // 标记
             for (int[] d : direction) {
                 int nr = cr + d[0], nc = cc + d[1];
-                if (nr < 0 || nr >= m || nc < 0 || nc >= n || grids[nr][nc] == 0) {
+                if (nr < 0 || nr >= m || nc < 0 || nc >= n || grids[nr][nc] == 1) {
                     continue;
                 }
-                if (nr == tr && nc == tc) {
-                    return pathLength;
+                if (nr == m - 1 && nc == n - 1) {
+                    return pathLength + 1;
                 }
                 queue.add(new Pair<>(nr, nc));
             }
@@ -501,13 +503,12 @@ Return:
 左边和上边是太平洋，右边和下边是大西洋，内部的数字代表海拔，海拔高的地方的水能够流到低的地方，求解水能够流到太平洋和大西洋的所有位置。
 
 ```java
-
 private int m, n;
 private int[][] matrix;
 private int[][] direction = {{0, 1}, {0, -1}, {1, 0}, {-1, 0}};
 
-public List<int[]> pacificAtlantic(int[][] matrix) {
-    List<int[]> ret = new ArrayList<>();
+public List<List<Integer>> pacificAtlantic(int[][] matrix) {
+    List<List<Integer>> ret = new ArrayList<>();
     if (matrix == null || matrix.length == 0) {
         return ret;
     }
@@ -530,7 +531,7 @@ public List<int[]> pacificAtlantic(int[][] matrix) {
     for (int i = 0; i < m; i++) {
         for (int j = 0; j < n; j++) {
             if (canReachP[i][j] && canReachA[i][j]) {
-                ret.add(new int[]{i, j});
+                ret.add(Arrays.asList(i, j));
             }
         }
     }
diff --git a/docs/notes/剑指 Offer 题解 - 10~19.md b/docs/notes/剑指 Offer 题解 - 10~19.md
index 458af00e..7f1848ba 100644
--- a/docs/notes/剑指 Offer 题解 - 10~19.md	
+++ b/docs/notes/剑指 Offer 题解 - 10~19.md	
@@ -18,7 +18,7 @@
 
 # 10.1 斐波那契数列
 
-[NowCoder](https://www.nowcoder.com/practice/c6c7742f5ba7442aada113136ddea0c3?tpId=13&tqId=11160&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/c6c7742f5ba7442aada113136ddea0c3?tpId=13&tqId=11160&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -86,7 +86,7 @@ public class Solution {
 
 # 10.2 矩形覆盖
 
-[NowCoder](https://www.nowcoder.com/practice/72a5a919508a4251859fb2cfb987a0e6?tpId=13&tqId=11163&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/72a5a919508a4251859fb2cfb987a0e6?tpId=13&tqId=11163&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -127,7 +127,7 @@ public int RectCover(int n) {
 
 # 10.3 跳台阶
 
-[NowCoder](https://www.nowcoder.com/practice/8c82a5b80378478f9484d87d1c5f12a4?tpId=13&tqId=11161&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/8c82a5b80378478f9484d87d1c5f12a4?tpId=13&tqId=11161&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -154,7 +154,7 @@ public int JumpFloor(int n) {
     if (n <= 2)
         return n;
     int pre2 = 1, pre1 = 2;
-    int result = 1;
+    int result = 0;
     for (int i = 2; i < n; i++) {
         result = pre2 + pre1;
         pre2 = pre1;
@@ -166,7 +166,7 @@ public int JumpFloor(int n) {
 
 # 10.4 变态跳台阶
 
-[NowCoder](https://www.nowcoder.com/practice/22243d016f6b47f2a6928b4313c85387?tpId=13&tqId=11162&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/22243d016f6b47f2a6928b4313c85387?tpId=13&tqId=11162&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -226,7 +226,7 @@ public int JumpFloorII(int target) {
 
 # 11. 旋转数组的最小数字
 
-[NowCoder](https://www.nowcoder.com/practice/9f3231a991af4f55b95579b44b7a01ba?tpId=13&tqId=11159&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/9f3231a991af4f55b95579b44b7a01ba?tpId=13&tqId=11159&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -292,7 +292,7 @@ private int minNumber(int[] nums, int l, int h) {
 
 # 12. 矩阵中的路径
 
-[NowCoder](https://www.nowcoder.com/practice/c61c6999eecb4b8f88a98f66b273a3cc?tpId=13&tqId=11218&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/c61c6999eecb4b8f88a98f66b273a3cc?tpId=13&tqId=11218&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -357,7 +357,7 @@ private char[][] buildMatrix(char[] array) {
 
 # 13. 机器人的运动范围
 
-[NowCoder](https://www.nowcoder.com/practice/6e5207314b5241fb83f2329e89fdecc8?tpId=13&tqId=11219&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/6e5207314b5241fb83f2329e89fdecc8?tpId=13&tqId=11219&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -469,7 +469,7 @@ public int integerBreak(int n) {
 
 # 15. 二进制中 1 的个数
 
-[NowCoder](https://www.nowcoder.com/practice/8ee967e43c2c4ec193b040ea7fbb10b8?tpId=13&tqId=11164&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/8ee967e43c2c4ec193b040ea7fbb10b8?tpId=13&tqId=11164&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -510,7 +510,7 @@ public int NumberOf1(int n) {
 
 # 16. 数值的整数次方
 
-[NowCoder](https://www.nowcoder.com/practice/1a834e5e3e1a4b7ba251417554e07c00?tpId=13&tqId=11165&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/1a834e5e3e1a4b7ba251417554e07c00?tpId=13&tqId=11165&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -626,7 +626,7 @@ public ListNode deleteNode(ListNode head, ListNode tobeDelete) {
 
 # 18.2 删除链表中重复的结点
 
-[NowCoder](https://www.nowcoder.com/practice/fc533c45b73a41b0b44ccba763f866ef?tpId=13&tqId=11209&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/fc533c45b73a41b0b44ccba763f866ef?tpId=13&tqId=11209&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -652,7 +652,7 @@ public ListNode deleteDuplication(ListNode pHead) {
 
 # 19. 正则表达式匹配
 
-[NowCoder](https://www.nowcoder.com/practice/45327ae22b7b413ea21df13ee7d6429c?tpId=13&tqId=11205&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/45327ae22b7b413ea21df13ee7d6429c?tpId=13&tqId=11205&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
diff --git a/docs/notes/剑指 Offer 题解 - 20~29.md b/docs/notes/剑指 Offer 题解 - 20~29.md
index 0bb8675c..c19b6f4c 100644
--- a/docs/notes/剑指 Offer 题解 - 20~29.md	
+++ b/docs/notes/剑指 Offer 题解 - 20~29.md	
@@ -14,7 +14,7 @@
 
 # 20. 表示数值的字符串
 
-[NowCoder](https://www.nowcoder.com/practice/6f8c901d091949a5837e24bb82a731f2?tpId=13&tqId=11206&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/6f8c901d091949a5837e24bb82a731f2?tpId=13&tqId=11206&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -64,7 +64,7 @@ public boolean isNumeric(char[] str) {
 
 # 21. 调整数组顺序使奇数位于偶数前面
 
-[NowCoder](https://www.nowcoder.com/practice/beb5aa231adc45b2a5dcc5b62c93f593?tpId=13&tqId=11166&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/beb5aa231adc45b2a5dcc5b62c93f593?tpId=13&tqId=11166&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -125,7 +125,7 @@ private void swap(int[] nums, int i, int j) {
 
 # 22. 链表中倒数第 K 个结点
 
-[NowCoder](https://www.nowcoder.com/practice/529d3ae5a407492994ad2a246518148a?tpId=13&tqId=11167&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/529d3ae5a407492994ad2a246518148a?tpId=13&tqId=11167&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 解题思路
 
@@ -153,7 +153,7 @@ public ListNode FindKthToTail(ListNode head, int k) {
 
 # 23. 链表中环的入口结点
 
-[NowCoder](https://www.nowcoder.com/practice/253d2c59ec3e4bc68da16833f79a38e4?tpId=13&tqId=11208&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/253d2c59ec3e4bc68da16833f79a38e4?tpId=13&tqId=11208&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -187,7 +187,7 @@ public ListNode EntryNodeOfLoop(ListNode pHead) {
 
 # 24. 反转链表
 
-[NowCoder](https://www.nowcoder.com/practice/75e878df47f24fdc9dc3e400ec6058ca?tpId=13&tqId=11168&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/75e878df47f24fdc9dc3e400ec6058ca?tpId=13&tqId=11168&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 解题思路
 
@@ -224,7 +224,7 @@ public ListNode ReverseList(ListNode head) {
 
 # 25. 合并两个排序的链表
 
-[NowCoder](https://www.nowcoder.com/practice/d8b6b4358f774294a89de2a6ac4d9337?tpId=13&tqId=11169&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/d8b6b4358f774294a89de2a6ac4d9337?tpId=13&tqId=11169&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -276,7 +276,7 @@ public ListNode Merge(ListNode list1, ListNode list2) {
 
 # 26. 树的子结构
 
-[NowCoder](https://www.nowcoder.com/practice/6e196c44c7004d15b1610b9afca8bd88?tpId=13&tqId=11170&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/6e196c44c7004d15b1610b9afca8bd88?tpId=13&tqId=11170&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -304,7 +304,7 @@ private boolean isSubtreeWithRoot(TreeNode root1, TreeNode root2) {
 
 # 27. 二叉树的镜像
 
-[NowCoder](https://www.nowcoder.com/practice/564f4c26aa584921bc75623e48ca3011?tpId=13&tqId=11171&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/564f4c26aa584921bc75623e48ca3011?tpId=13&tqId=11171&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -330,7 +330,7 @@ private void swap(TreeNode root) {
 
 # 28 对称的二叉树
 
-[NowCoder](https://www.nowcoder.com/practice/ff05d44dfdb04e1d83bdbdab320efbcb?tpId=13&tqId=11211&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/ff05d44dfdb04e1d83bdbdab320efbcb?tpId=13&tqId=11211&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -358,7 +358,7 @@ boolean isSymmetrical(TreeNode t1, TreeNode t2) {
 
 # 29. 顺时针打印矩阵
 
-[NowCoder](https://www.nowcoder.com/practice/9b4c81a02cd34f76be2659fa0d54342a?tpId=13&tqId=11172&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/9b4c81a02cd34f76be2659fa0d54342a?tpId=13&tqId=11172&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
diff --git a/docs/notes/剑指 Offer 题解 - 30~39.md b/docs/notes/剑指 Offer 题解 - 30~39.md
index 6f949cde..8617c697 100644
--- a/docs/notes/剑指 Offer 题解 - 30~39.md	
+++ b/docs/notes/剑指 Offer 题解 - 30~39.md	
@@ -16,7 +16,7 @@
 
 # 30. 包含 min 函数的栈
 
-[NowCoder](https://www.nowcoder.com/practice/4c776177d2c04c2494f2555c9fcc1e49?tpId=13&tqId=11173&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/4c776177d2c04c2494f2555c9fcc1e49?tpId=13&tqId=11173&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -49,7 +49,7 @@ public int min() {
 
 # 31. 栈的压入、弹出序列
 
-[NowCoder](https://www.nowcoder.com/practice/d77d11405cc7470d82554cb392585106?tpId=13&tqId=11174&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/d77d11405cc7470d82554cb392585106?tpId=13&tqId=11174&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -79,7 +79,7 @@ public boolean IsPopOrder(int[] pushSequence, int[] popSequence) {
 
 # 32.1 从上往下打印二叉树
 
-[NowCoder](https://www.nowcoder.com/practice/7fe2212963db4790b57431d9ed259701?tpId=13&tqId=11175&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/7fe2212963db4790b57431d9ed259701?tpId=13&tqId=11175&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -117,7 +117,7 @@ public ArrayList<Integer> PrintFromTopToBottom(TreeNode root) {
 
 # 32.2 把二叉树打印成多行
 
-[NowCoder](https://www.nowcoder.com/practice/445c44d982d04483b04a54f298796288?tpId=13&tqId=11213&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/445c44d982d04483b04a54f298796288?tpId=13&tqId=11213&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -150,7 +150,7 @@ ArrayList<ArrayList<Integer>> Print(TreeNode pRoot) {
 
 # 32.3 按之字形顺序打印二叉树
 
-[NowCoder](https://www.nowcoder.com/practice/91b69814117f4e8097390d107d2efbe0?tpId=13&tqId=11212&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/91b69814117f4e8097390d107d2efbe0?tpId=13&tqId=11212&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -187,7 +187,7 @@ public ArrayList<ArrayList<Integer>> Print(TreeNode pRoot) {
 
 # 33. 二叉搜索树的后序遍历序列
 
-[NowCoder](https://www.nowcoder.com/practice/a861533d45854474ac791d90e447bafd?tpId=13&tqId=11176&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/a861533d45854474ac791d90e447bafd?tpId=13&tqId=11176&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -222,7 +222,7 @@ private boolean verify(int[] sequence, int first, int last) {
 
 # 34. 二叉树中和为某一值的路径
 
-[NowCoder](https://www.nowcoder.com/practice/b736e784e3e34731af99065031301bca?tpId=13&tqId=11177&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/b736e784e3e34731af99065031301bca?tpId=13&tqId=11177&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -259,7 +259,7 @@ private void backtracking(TreeNode node, int target, ArrayList<Integer> path) {
 
 # 35. 复杂链表的复制
 
-[NowCoder](https://www.nowcoder.com/practice/f836b2c43afc4b35ad6adc41ec941dba?tpId=13&tqId=11178&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/f836b2c43afc4b35ad6adc41ec941dba?tpId=13&tqId=11178&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -327,7 +327,7 @@ public RandomListNode Clone(RandomListNode pHead) {
 
 # 36. 二叉搜索树与双向链表
 
-[NowCoder](https://www.nowcoder.com/practice/947f6eb80d944a84850b0538bf0ec3a5?tpId=13&tqId=11179&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/947f6eb80d944a84850b0538bf0ec3a5?tpId=13&tqId=11179&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -362,7 +362,7 @@ private void inOrder(TreeNode node) {
 
 # 37. 序列化二叉树
 
-[NowCoder](https://www.nowcoder.com/practice/cf7e25aa97c04cc1a68c8f040e71fb84?tpId=13&tqId=11214&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/cf7e25aa97c04cc1a68c8f040e71fb84?tpId=13&tqId=11214&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -402,7 +402,7 @@ private TreeNode Deserialize() {
 
 # 38. 字符串的排列
 
-[NowCoder](https://www.nowcoder.com/practice/fe6b651b66ae47d7acce78ffdd9a96c7?tpId=13&tqId=11180&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/fe6b651b66ae47d7acce78ffdd9a96c7?tpId=13&tqId=11180&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -443,7 +443,7 @@ private void backtracking(char[] chars, boolean[] hasUsed, StringBuilder s) {
 
 # 39. 数组中出现次数超过一半的数字
 
-[NowCoder](https://www.nowcoder.com/practice/e8a1b01a2df14cb2b228b30ee6a92163?tpId=13&tqId=11181&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/e8a1b01a2df14cb2b228b30ee6a92163?tpId=13&tqId=11181&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 解题思路
 
diff --git a/docs/notes/剑指 Offer 题解 - 3~9.md b/docs/notes/剑指 Offer 题解 - 3~9.md
index 9c13c2b7..5a9096ee 100644
--- a/docs/notes/剑指 Offer 题解 - 3~9.md	
+++ b/docs/notes/剑指 Offer 题解 - 3~9.md	
@@ -11,7 +11,7 @@
 
 # 3. 数组中重复的数字
 
-[NowCoder](https://www.nowcoder.com/practice/623a5ac0ea5b4e5f95552655361ae0a8?tpId=13&tqId=11203&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/623a5ac0ea5b4e5f95552655361ae0a8?tpId=13&tqId=11203&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -61,7 +61,7 @@ private void swap(int[] nums, int i, int j) {
 
 # 4. 二维数组中的查找
 
-[NowCoder](https://www.nowcoder.com/practice/abc3fe2ce8e146608e868a70efebf62e?tpId=13&tqId=11154&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/abc3fe2ce8e146608e868a70efebf62e?tpId=13&tqId=11154&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -109,7 +109,7 @@ public boolean Find(int target, int[][] matrix) {
 
 # 5. 替换空格
 
-[NowCoder](https://www.nowcoder.com/practice/4060ac7e3e404ad1a894ef3e17650423?tpId=13&tqId=11155&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/4060ac7e3e404ad1a894ef3e17650423?tpId=13&tqId=11155&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -158,7 +158,7 @@ public String replaceSpace(StringBuffer str) {
 
 # 6. 从尾到头打印链表
 
-[NowCoder](https://www.nowcoder.com/practice/d0267f7f55b3412ba93bd35cfa8e8035?tpId=13&tqId=11156&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/d0267f7f55b3412ba93bd35cfa8e8035?tpId=13&tqId=11156&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -237,7 +237,7 @@ public ArrayList<Integer> printListFromTailToHead(ListNode listNode) {
 
 # 7. 重建二叉树
 
-[NowCoder](https://www.nowcoder.com/practice/8a19cbe657394eeaac2f6ea9b0f6fcf6?tpId=13&tqId=11157&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/8a19cbe657394eeaac2f6ea9b0f6fcf6?tpId=13&tqId=11157&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -276,7 +276,7 @@ private TreeNode reConstructBinaryTree(int[] pre, int preL, int preR, int inL) {
 
 # 8. 二叉树的下一个结点
 
-[NowCoder](https://www.nowcoder.com/practice/9023a0c988684a53960365b889ceaf5e?tpId=13&tqId=11210&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/9023a0c988684a53960365b889ceaf5e?tpId=13&tqId=11210&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -327,7 +327,7 @@ public TreeLinkNode GetNext(TreeLinkNode pNode) {
 
 # 9. 用两个栈实现队列
 
-[NowCoder](https://www.nowcoder.com/practice/54275ddae22f475981afa2244dd448c6?tpId=13&tqId=11158&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/54275ddae22f475981afa2244dd448c6?tpId=13&tqId=11158&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
diff --git a/docs/notes/剑指 Offer 题解 - 40~49.md b/docs/notes/剑指 Offer 题解 - 40~49.md
index 7dc925fd..61bbc96d 100644
--- a/docs/notes/剑指 Offer 题解 - 40~49.md	
+++ b/docs/notes/剑指 Offer 题解 - 40~49.md	
@@ -15,7 +15,7 @@
 
 # 40. 最小的 K 个数
 
-[NowCoder](https://www.nowcoder.com/practice/6a296eb82cf844ca8539b57c23e6e9bf?tpId=13&tqId=11182&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/6a296eb82cf844ca8539b57c23e6e9bf?tpId=13&tqId=11182&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 解题思路
 
@@ -97,7 +97,7 @@ public ArrayList<Integer> GetLeastNumbers_Solution(int[] nums, int k) {
 
 # 41.1 数据流中的中位数
 
-[NowCoder](https://www.nowcoder.com/practice/9be0172896bd43948f8a32fb954e1be1?tpId=13&tqId=11216&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/9be0172896bd43948f8a32fb954e1be1?tpId=13&tqId=11216&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -138,7 +138,7 @@ public Double GetMedian() {
 
 # 41.2 字符流中第一个不重复的字符
 
-[NowCoder](https://www.nowcoder.com/practice/00de97733b8e4f97a3fb5c680ee10720?tpId=13&tqId=11207&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/00de97733b8e4f97a3fb5c680ee10720?tpId=13&tqId=11207&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -164,7 +164,7 @@ public char FirstAppearingOnce() {
 
 # 42. 连续子数组的最大和
 
-[NowCoder](https://www.nowcoder.com/practice/459bd355da1549fa8a49e350bf3df484?tpId=13&tqId=11183&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/459bd355da1549fa8a49e350bf3df484?tpId=13&tqId=11183&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -188,7 +188,7 @@ public int FindGreatestSumOfSubArray(int[] nums) {
 
 # 43. 从 1 到 n 整数中 1 出现的次数
 
-[NowCoder](https://www.nowcoder.com/practice/bd7f978302044eee894445e244c7eee6?tpId=13&tqId=11184&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/bd7f978302044eee894445e244c7eee6?tpId=13&tqId=11184&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 解题思路
 
@@ -262,7 +262,7 @@ private int getDigitAtIndex(int index, int place) {
 
 # 45. 把数组排成最小的数
 
-[NowCoder](https://www.nowcoder.com/practice/8fecd3f8ba334add803bf2a06af1b993?tpId=13&tqId=11185&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/8fecd3f8ba334add803bf2a06af1b993?tpId=13&tqId=11185&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -388,7 +388,7 @@ public int longestSubStringWithoutDuplication(String str) {
 
 # 49. 丑数
 
-[NowCoder](https://www.nowcoder.com/practice/6aa9e04fc3794f68acf8778237ba065b?tpId=13&tqId=11186&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/6aa9e04fc3794f68acf8778237ba065b?tpId=13&tqId=11186&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
diff --git a/docs/notes/剑指 Offer 题解 - 50~59.md b/docs/notes/剑指 Offer 题解 - 50~59.md
index a84cb37b..5f4f6d5f 100644
--- a/docs/notes/剑指 Offer 题解 - 50~59.md	
+++ b/docs/notes/剑指 Offer 题解 - 50~59.md	
@@ -17,7 +17,7 @@
 
 # 50. 第一个只出现一次的字符位置
 
-[NowCoder](https://www.nowcoder.com/practice/1c82e8cf713b4bbeb2a5b31cf5b0417c?tpId=13&tqId=11187&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/1c82e8cf713b4bbeb2a5b31cf5b0417c?tpId=13&tqId=11187&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -67,7 +67,7 @@ public int FirstNotRepeatingChar2(String str) {
 
 # 51. 数组中的逆序对
 
-[NowCoder](https://www.nowcoder.com/practice/96bd6684e04a44eb80e6a68efc0ec6c5?tpId=13&tqId=11188&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/96bd6684e04a44eb80e6a68efc0ec6c5?tpId=13&tqId=11188&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -116,7 +116,7 @@ private void merge(int[] nums, int l, int m, int h) {
 
 # 52. 两个链表的第一个公共结点
 
-[NowCoder](https://www.nowcoder.com/practice/6ab1d9a29e88450685099d45c9e31e46?tpId=13&tqId=11189&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/6ab1d9a29e88450685099d45c9e31e46?tpId=13&tqId=11189&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -141,7 +141,7 @@ public ListNode FindFirstCommonNode(ListNode pHead1, ListNode pHead2) {
 
 # 53. 数字在排序数组中出现的次数
 
-[NowCoder](https://www.nowcoder.com/practice/70610bf967994b22bb1c26f9ae901fa2?tpId=13&tqId=11190&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/70610bf967994b22bb1c26f9ae901fa2?tpId=13&tqId=11190&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -178,7 +178,7 @@ private int binarySearch(int[] nums, int K) {
 
 # 54. 二叉查找树的第 K 个结点
 
-[NowCoder](https://www.nowcoder.com/practice/ef068f602dde4d28aab2b210e859150a?tpId=13&tqId=11215&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/ef068f602dde4d28aab2b210e859150a?tpId=13&tqId=11215&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 解题思路
 
@@ -206,7 +206,7 @@ private void inOrder(TreeNode root, int k) {
 
 # 55.1 二叉树的深度
 
-[NowCoder](https://www.nowcoder.com/practice/435fb86331474282a3499955f0a41e8b?tpId=13&tqId=11191&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/435fb86331474282a3499955f0a41e8b?tpId=13&tqId=11191&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -224,7 +224,7 @@ public int TreeDepth(TreeNode root) {
 
 # 55.2 平衡二叉树
 
-[NowCoder](https://www.nowcoder.com/practice/8b3b95850edb4115918ecebdf1b4d222?tpId=13&tqId=11192&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/8b3b95850edb4115918ecebdf1b4d222?tpId=13&tqId=11192&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -255,7 +255,7 @@ private int height(TreeNode root) {
 
 # 56. 数组中只出现一次的数字
 
-[NowCoder](https://www.nowcoder.com/practice/e02fdb54d7524710a7d664d082bb7811?tpId=13&tqId=11193&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/e02fdb54d7524710a7d664d082bb7811?tpId=13&tqId=11193&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -284,7 +284,7 @@ public void FindNumsAppearOnce(int[] nums, int num1[], int num2[]) {
 
 # 57.1 和为 S 的两个数字
 
-[NowCoder](https://www.nowcoder.com/practice/390da4f7a00f44bea7c2f3d19491311b?tpId=13&tqId=11195&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/390da4f7a00f44bea7c2f3d19491311b?tpId=13&tqId=11195&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -316,7 +316,7 @@ public ArrayList<Integer> FindNumbersWithSum(int[] array, int sum) {
 
 # 57.2 和为 S 的连续正数序列
 
-[NowCoder](https://www.nowcoder.com/practice/c451a3fd84b64cb19485dad758a55ebe?tpId=13&tqId=11194&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/c451a3fd84b64cb19485dad758a55ebe?tpId=13&tqId=11194&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -360,7 +360,7 @@ public ArrayList<ArrayList<Integer>> FindContinuousSequence(int sum) {
 
 # 58.1 翻转单词顺序列
 
-[NowCoder](https://www.nowcoder.com/practice/3194a4f4cf814f63919d0790578d51f3?tpId=13&tqId=11197&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/3194a4f4cf814f63919d0790578d51f3?tpId=13&tqId=11197&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -408,7 +408,7 @@ private void swap(char[] c, int i, int j) {
 
 # 58.2 左旋转字符串
 
-[NowCoder](https://www.nowcoder.com/practice/12d959b108cb42b1ab72cef4d36af5ec?tpId=13&tqId=11196&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/12d959b108cb42b1ab72cef4d36af5ec?tpId=13&tqId=11196&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -450,7 +450,7 @@ private void swap(char[] chars, int i, int j) {
 
 # 59. 滑动窗口的最大值
 
-[NowCoder](https://www.nowcoder.com/practice/1624bc35a45c42c0bc17d17fa0cba788?tpId=13&tqId=11217&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/1624bc35a45c42c0bc17d17fa0cba788?tpId=13&tqId=11217&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
diff --git a/docs/notes/剑指 Offer 题解 - 60~68.md b/docs/notes/剑指 Offer 题解 - 60~68.md
index 2887629b..c1a36c82 100644
--- a/docs/notes/剑指 Offer 题解 - 60~68.md	
+++ b/docs/notes/剑指 Offer 题解 - 60~68.md	
@@ -86,7 +86,7 @@ public List<Map.Entry<Integer, Double>> dicesSum(int n) {
 
 # 61. 扑克牌顺子
 
-[NowCoder](https://www.nowcoder.com/practice/762836f4d43d43ca9deb273b3de8e1f4?tpId=13&tqId=11198&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/762836f4d43d43ca9deb273b3de8e1f4?tpId=13&tqId=11198&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -124,7 +124,7 @@ public boolean isContinuous(int[] nums) {
 
 # 62. 圆圈中最后剩下的数
 
-[NowCoder](https://www.nowcoder.com/practice/f78a359491e64a50bce2d89cff857eb6?tpId=13&tqId=11199&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/f78a359491e64a50bce2d89cff857eb6?tpId=13&tqId=11199&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -174,7 +174,7 @@ public int maxProfit(int[] prices) {
 
 # 64. 求 1+2+3+...+n
 
-[NowCoder](https://www.nowcoder.com/practice/7a0da8fc483247ff8800059e12d7caf1?tpId=13&tqId=11200&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/7a0da8fc483247ff8800059e12d7caf1?tpId=13&tqId=11200&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -198,7 +198,7 @@ public int Sum_Solution(int n) {
 
 # 65. 不用加减乘除做加法
 
-[NowCoder](https://www.nowcoder.com/practice/59ac416b4b944300b617d4f7f111b215?tpId=13&tqId=11201&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/59ac416b4b944300b617d4f7f111b215?tpId=13&tqId=11201&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -218,7 +218,7 @@ public int Add(int a, int b) {
 
 # 66. 构建乘积数组
 
-[NowCoder](https://www.nowcoder.com/practice/94a4d381a68b47b7a8bed86f2975db46?tpId=13&tqId=11204&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/94a4d381a68b47b7a8bed86f2975db46?tpId=13&tqId=11204&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -243,7 +243,7 @@ public int[] multiply(int[] A) {
 
 # 67. 把字符串转换成整数
 
-[NowCoder](https://www.nowcoder.com/practice/1277c681251b4372bdef344468e4f26e?tpId=13&tqId=11202&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/1277c681251b4372bdef344468e4f26e?tpId=13&tqId=11202&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
diff --git a/docs/pics/ffd96b99-8009-487c-8e98-11c9d44ef14f.png b/docs/pics/ffd96b99-8009-487c-8e98-11c9d44ef14f.png
new file mode 100644
index 00000000..b01c1ca0
Binary files /dev/null and b/docs/pics/ffd96b99-8009-487c-8e98-11c9d44ef14f.png differ
diff --git a/notes/Java 基础.md b/notes/Java 基础.md
index dc943c68..4198ac4d 100644
--- a/notes/Java 基础.md	
+++ b/notes/Java 基础.md	
@@ -1420,7 +1420,6 @@ Java 注解是附加在代码中的一些元信息，用于一些工具在编译
 - Java 不支持多重继承，只能通过实现多个接口来达到相同目的，而 C++ 支持多重继承。
 - Java 不支持操作符重载，虽然可以对两个 String 对象执行加法运算，但是这是语言内置支持的操作，不属于操作符重载，而 C++ 可以。
 - Java 的 goto 是保留字，但是不可用，C++ 可以使用 goto。
-- Java 不支持条件编译，C++ 通过 #ifdef #ifndef 等预处理命令从而实现条件编译。
 
 [What are the main differences between Java and C++?](http://cs-fundamentals.com/tech-interview/java/differences-between-java-and-cpp.php)
 
diff --git a/notes/Leetcode 题解 - 位运算.md b/notes/Leetcode 题解 - 位运算.md
index d4c659b7..a89999ad 100644
--- a/notes/Leetcode 题解 - 位运算.md	
+++ b/notes/Leetcode 题解 - 位运算.md	
@@ -47,9 +47,9 @@ x ^ x = 0       x & x = x       x | x = x
 
 要得到只有第 i 位为 1 的 mask，将 1 向左移动 i-1 位即可，1&lt;&lt;(i-1) 。例如 1&lt;&lt;4 得到只有第 5 位为 1 的 mask ：00010000。
 
-要得到 1 到 i 位为 1 的 mask，1&lt;&lt;(i+1)-1 即可，例如将 1&lt;&lt;(4+1)-1 = 00010000-1 = 00001111。
+要得到 1 到 i 位为 1 的 mask，(1&lt;&lt;i)-1 即可，例如将 (1&lt;&lt;4)-1 = 00010000-1 = 00001111。
 
-要得到 1 到 i 位为 0 的 mask，只需将 1 到 i 位为 1 的 mask 取反，即 \~(1&lt;&lt;(i+1)-1)。
+要得到 1 到 i 位为 0 的 mask，只需将 1 到 i 位为 1 的 mask 取反，即 \~((1&lt;&lt;i)-1)。
 
 **Java 中的位操作** 
 
diff --git a/notes/Leetcode 题解 - 动态规划.md b/notes/Leetcode 题解 - 动态规划.md
index 01a3f6c5..59aa4be7 100644
--- a/notes/Leetcode 题解 - 动态规划.md	
+++ b/notes/Leetcode 题解 - 动态规划.md	
@@ -994,6 +994,7 @@ public int combinationSum4(int[] nums, int target) {
 
 <div align="center"> <img src="pics/83acbb02-872a-4178-b22a-c89c3cb60263.jpg" width="300px"> </div><br>
 
+
 ```java
 public int maxProfit(int[] prices) {
     if (prices == null || prices.length == 0) {
diff --git a/notes/Leetcode 题解 - 搜索.md b/notes/Leetcode 题解 - 搜索.md
index 0437af64..4ce16d89 100644
--- a/notes/Leetcode 题解 - 搜索.md	
+++ b/notes/Leetcode 题解 - 搜索.md	
@@ -61,6 +61,8 @@
 
 ## 1. 计算在网格中从原点到特定点的最短路径长度
 
+[1091. Shortest Path in Binary Matrix(Medium)](https://leetcode.com/problems/shortest-path-in-binary-matrix/)
+
 ```html
 [[1,1,0,1],
  [1,0,1,0],
@@ -68,12 +70,12 @@
  [1,0,1,1]]
 ```
 
-题目描述：1 表示可以经过某个位置，求解从 (0, 0) 位置到 (tr, tc) 位置的最短路径长度。
+题目描述：0 表示可以经过某个位置，求解从左上角到右下角的最短路径长度。
 
 ```java
-public int minPathLength(int[][] grids, int tr, int tc) {
-    final int[][] direction = {{1, 0}, {-1, 0}, {0, 1}, {0, -1}};
-    final int m = grids.length, n = grids[0].length;
+public int shortestPathBinaryMatrix(int[][] grids) {
+    int[][] direction = {{1, -1}, {1, 0}, {1, 1}, {0, -1}, {0, 1}, {-1, -1}, {-1, 0}, {-1, 1}};
+    int m = grids.length, n = grids[0].length;
     Queue<Pair<Integer, Integer>> queue = new LinkedList<>();
     queue.add(new Pair<>(0, 0));
     int pathLength = 0;
@@ -83,14 +85,14 @@ public int minPathLength(int[][] grids, int tr, int tc) {
         while (size-- > 0) {
             Pair<Integer, Integer> cur = queue.poll();
             int cr = cur.getKey(), cc = cur.getValue();
-            grids[cr][cc] = 0; // 标记
+            grids[cr][cc] = 1; // 标记
             for (int[] d : direction) {
                 int nr = cr + d[0], nc = cc + d[1];
-                if (nr < 0 || nr >= m || nc < 0 || nc >= n || grids[nr][nc] == 0) {
+                if (nr < 0 || nr >= m || nc < 0 || nc >= n || grids[nr][nc] == 1) {
                     continue;
                 }
-                if (nr == tr && nc == tc) {
-                    return pathLength;
+                if (nr == m - 1 && nc == n - 1) {
+                    return pathLength + 1;
                 }
                 queue.add(new Pair<>(nr, nc));
             }
@@ -501,13 +503,12 @@ Return:
 左边和上边是太平洋，右边和下边是大西洋，内部的数字代表海拔，海拔高的地方的水能够流到低的地方，求解水能够流到太平洋和大西洋的所有位置。
 
 ```java
-
 private int m, n;
 private int[][] matrix;
 private int[][] direction = {{0, 1}, {0, -1}, {1, 0}, {-1, 0}};
 
-public List<int[]> pacificAtlantic(int[][] matrix) {
-    List<int[]> ret = new ArrayList<>();
+public List<List<Integer>> pacificAtlantic(int[][] matrix) {
+    List<List<Integer>> ret = new ArrayList<>();
     if (matrix == null || matrix.length == 0) {
         return ret;
     }
@@ -530,7 +531,7 @@ public List<int[]> pacificAtlantic(int[][] matrix) {
     for (int i = 0; i < m; i++) {
         for (int j = 0; j < n; j++) {
             if (canReachP[i][j] && canReachA[i][j]) {
-                ret.add(new int[]{i, j});
+                ret.add(Arrays.asList(i, j));
             }
         }
     }
diff --git a/notes/pics/ffd96b99-8009-487c-8e98-11c9d44ef14f.png b/notes/pics/ffd96b99-8009-487c-8e98-11c9d44ef14f.png
new file mode 100644
index 00000000..b01c1ca0
Binary files /dev/null and b/notes/pics/ffd96b99-8009-487c-8e98-11c9d44ef14f.png differ
diff --git a/notes/剑指 Offer 题解 - 10~19.md b/notes/剑指 Offer 题解 - 10~19.md
index 57c4cd70..7b2c78fe 100644
--- a/notes/剑指 Offer 题解 - 10~19.md	
+++ b/notes/剑指 Offer 题解 - 10~19.md	
@@ -18,7 +18,7 @@
 
 # 10.1 斐波那契数列
 
-[NowCoder](https://www.nowcoder.com/practice/c6c7742f5ba7442aada113136ddea0c3?tpId=13&tqId=11160&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/c6c7742f5ba7442aada113136ddea0c3?tpId=13&tqId=11160&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -86,7 +86,7 @@ public class Solution {
 
 # 10.2 矩形覆盖
 
-[NowCoder](https://www.nowcoder.com/practice/72a5a919508a4251859fb2cfb987a0e6?tpId=13&tqId=11163&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/72a5a919508a4251859fb2cfb987a0e6?tpId=13&tqId=11163&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -127,7 +127,7 @@ public int RectCover(int n) {
 
 # 10.3 跳台阶
 
-[NowCoder](https://www.nowcoder.com/practice/8c82a5b80378478f9484d87d1c5f12a4?tpId=13&tqId=11161&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/8c82a5b80378478f9484d87d1c5f12a4?tpId=13&tqId=11161&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -154,7 +154,7 @@ public int JumpFloor(int n) {
     if (n <= 2)
         return n;
     int pre2 = 1, pre1 = 2;
-    int result = 1;
+    int result = 0;
     for (int i = 2; i < n; i++) {
         result = pre2 + pre1;
         pre2 = pre1;
@@ -166,7 +166,7 @@ public int JumpFloor(int n) {
 
 # 10.4 变态跳台阶
 
-[NowCoder](https://www.nowcoder.com/practice/22243d016f6b47f2a6928b4313c85387?tpId=13&tqId=11162&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/22243d016f6b47f2a6928b4313c85387?tpId=13&tqId=11162&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -226,7 +226,7 @@ public int JumpFloorII(int target) {
 
 # 11. 旋转数组的最小数字
 
-[NowCoder](https://www.nowcoder.com/practice/9f3231a991af4f55b95579b44b7a01ba?tpId=13&tqId=11159&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/9f3231a991af4f55b95579b44b7a01ba?tpId=13&tqId=11159&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -292,7 +292,7 @@ private int minNumber(int[] nums, int l, int h) {
 
 # 12. 矩阵中的路径
 
-[NowCoder](https://www.nowcoder.com/practice/c61c6999eecb4b8f88a98f66b273a3cc?tpId=13&tqId=11218&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/c61c6999eecb4b8f88a98f66b273a3cc?tpId=13&tqId=11218&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -357,7 +357,7 @@ private char[][] buildMatrix(char[] array) {
 
 # 13. 机器人的运动范围
 
-[NowCoder](https://www.nowcoder.com/practice/6e5207314b5241fb83f2329e89fdecc8?tpId=13&tqId=11219&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/6e5207314b5241fb83f2329e89fdecc8?tpId=13&tqId=11219&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -469,7 +469,7 @@ public int integerBreak(int n) {
 
 # 15. 二进制中 1 的个数
 
-[NowCoder](https://www.nowcoder.com/practice/8ee967e43c2c4ec193b040ea7fbb10b8?tpId=13&tqId=11164&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/8ee967e43c2c4ec193b040ea7fbb10b8?tpId=13&tqId=11164&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -510,7 +510,7 @@ public int NumberOf1(int n) {
 
 # 16. 数值的整数次方
 
-[NowCoder](https://www.nowcoder.com/practice/1a834e5e3e1a4b7ba251417554e07c00?tpId=13&tqId=11165&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/1a834e5e3e1a4b7ba251417554e07c00?tpId=13&tqId=11165&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -626,7 +626,7 @@ public ListNode deleteNode(ListNode head, ListNode tobeDelete) {
 
 # 18.2 删除链表中重复的结点
 
-[NowCoder](https://www.nowcoder.com/practice/fc533c45b73a41b0b44ccba763f866ef?tpId=13&tqId=11209&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/fc533c45b73a41b0b44ccba763f866ef?tpId=13&tqId=11209&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -652,7 +652,7 @@ public ListNode deleteDuplication(ListNode pHead) {
 
 # 19. 正则表达式匹配
 
-[NowCoder](https://www.nowcoder.com/practice/45327ae22b7b413ea21df13ee7d6429c?tpId=13&tqId=11205&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/45327ae22b7b413ea21df13ee7d6429c?tpId=13&tqId=11205&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
diff --git a/notes/剑指 Offer 题解 - 20~29.md b/notes/剑指 Offer 题解 - 20~29.md
index 3f72f933..315b7527 100644
--- a/notes/剑指 Offer 题解 - 20~29.md	
+++ b/notes/剑指 Offer 题解 - 20~29.md	
@@ -14,7 +14,7 @@
 
 # 20. 表示数值的字符串
 
-[NowCoder](https://www.nowcoder.com/practice/6f8c901d091949a5837e24bb82a731f2?tpId=13&tqId=11206&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/6f8c901d091949a5837e24bb82a731f2?tpId=13&tqId=11206&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -64,7 +64,7 @@ public boolean isNumeric(char[] str) {
 
 # 21. 调整数组顺序使奇数位于偶数前面
 
-[NowCoder](https://www.nowcoder.com/practice/beb5aa231adc45b2a5dcc5b62c93f593?tpId=13&tqId=11166&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/beb5aa231adc45b2a5dcc5b62c93f593?tpId=13&tqId=11166&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -125,7 +125,7 @@ private void swap(int[] nums, int i, int j) {
 
 # 22. 链表中倒数第 K 个结点
 
-[NowCoder](https://www.nowcoder.com/practice/529d3ae5a407492994ad2a246518148a?tpId=13&tqId=11167&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/529d3ae5a407492994ad2a246518148a?tpId=13&tqId=11167&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 解题思路
 
@@ -153,7 +153,7 @@ public ListNode FindKthToTail(ListNode head, int k) {
 
 # 23. 链表中环的入口结点
 
-[NowCoder](https://www.nowcoder.com/practice/253d2c59ec3e4bc68da16833f79a38e4?tpId=13&tqId=11208&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/253d2c59ec3e4bc68da16833f79a38e4?tpId=13&tqId=11208&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -187,7 +187,7 @@ public ListNode EntryNodeOfLoop(ListNode pHead) {
 
 # 24. 反转链表
 
-[NowCoder](https://www.nowcoder.com/practice/75e878df47f24fdc9dc3e400ec6058ca?tpId=13&tqId=11168&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/75e878df47f24fdc9dc3e400ec6058ca?tpId=13&tqId=11168&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 解题思路
 
@@ -224,7 +224,7 @@ public ListNode ReverseList(ListNode head) {
 
 # 25. 合并两个排序的链表
 
-[NowCoder](https://www.nowcoder.com/practice/d8b6b4358f774294a89de2a6ac4d9337?tpId=13&tqId=11169&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/d8b6b4358f774294a89de2a6ac4d9337?tpId=13&tqId=11169&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -276,7 +276,7 @@ public ListNode Merge(ListNode list1, ListNode list2) {
 
 # 26. 树的子结构
 
-[NowCoder](https://www.nowcoder.com/practice/6e196c44c7004d15b1610b9afca8bd88?tpId=13&tqId=11170&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/6e196c44c7004d15b1610b9afca8bd88?tpId=13&tqId=11170&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -304,7 +304,7 @@ private boolean isSubtreeWithRoot(TreeNode root1, TreeNode root2) {
 
 # 27. 二叉树的镜像
 
-[NowCoder](https://www.nowcoder.com/practice/564f4c26aa584921bc75623e48ca3011?tpId=13&tqId=11171&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/564f4c26aa584921bc75623e48ca3011?tpId=13&tqId=11171&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -330,7 +330,7 @@ private void swap(TreeNode root) {
 
 # 28 对称的二叉树
 
-[NowCoder](https://www.nowcoder.com/practice/ff05d44dfdb04e1d83bdbdab320efbcb?tpId=13&tqId=11211&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/ff05d44dfdb04e1d83bdbdab320efbcb?tpId=13&tqId=11211&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -358,7 +358,7 @@ boolean isSymmetrical(TreeNode t1, TreeNode t2) {
 
 # 29. 顺时针打印矩阵
 
-[NowCoder](https://www.nowcoder.com/practice/9b4c81a02cd34f76be2659fa0d54342a?tpId=13&tqId=11172&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/9b4c81a02cd34f76be2659fa0d54342a?tpId=13&tqId=11172&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
diff --git a/notes/剑指 Offer 题解 - 30~39.md b/notes/剑指 Offer 题解 - 30~39.md
index 979e3526..bcf357ca 100644
--- a/notes/剑指 Offer 题解 - 30~39.md	
+++ b/notes/剑指 Offer 题解 - 30~39.md	
@@ -16,7 +16,7 @@
 
 # 30. 包含 min 函数的栈
 
-[NowCoder](https://www.nowcoder.com/practice/4c776177d2c04c2494f2555c9fcc1e49?tpId=13&tqId=11173&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/4c776177d2c04c2494f2555c9fcc1e49?tpId=13&tqId=11173&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -49,7 +49,7 @@ public int min() {
 
 # 31. 栈的压入、弹出序列
 
-[NowCoder](https://www.nowcoder.com/practice/d77d11405cc7470d82554cb392585106?tpId=13&tqId=11174&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/d77d11405cc7470d82554cb392585106?tpId=13&tqId=11174&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -79,7 +79,7 @@ public boolean IsPopOrder(int[] pushSequence, int[] popSequence) {
 
 # 32.1 从上往下打印二叉树
 
-[NowCoder](https://www.nowcoder.com/practice/7fe2212963db4790b57431d9ed259701?tpId=13&tqId=11175&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/7fe2212963db4790b57431d9ed259701?tpId=13&tqId=11175&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -117,7 +117,7 @@ public ArrayList<Integer> PrintFromTopToBottom(TreeNode root) {
 
 # 32.2 把二叉树打印成多行
 
-[NowCoder](https://www.nowcoder.com/practice/445c44d982d04483b04a54f298796288?tpId=13&tqId=11213&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/445c44d982d04483b04a54f298796288?tpId=13&tqId=11213&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -150,7 +150,7 @@ ArrayList<ArrayList<Integer>> Print(TreeNode pRoot) {
 
 # 32.3 按之字形顺序打印二叉树
 
-[NowCoder](https://www.nowcoder.com/practice/91b69814117f4e8097390d107d2efbe0?tpId=13&tqId=11212&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/91b69814117f4e8097390d107d2efbe0?tpId=13&tqId=11212&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -187,7 +187,7 @@ public ArrayList<ArrayList<Integer>> Print(TreeNode pRoot) {
 
 # 33. 二叉搜索树的后序遍历序列
 
-[NowCoder](https://www.nowcoder.com/practice/a861533d45854474ac791d90e447bafd?tpId=13&tqId=11176&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/a861533d45854474ac791d90e447bafd?tpId=13&tqId=11176&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -222,7 +222,7 @@ private boolean verify(int[] sequence, int first, int last) {
 
 # 34. 二叉树中和为某一值的路径
 
-[NowCoder](https://www.nowcoder.com/practice/b736e784e3e34731af99065031301bca?tpId=13&tqId=11177&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/b736e784e3e34731af99065031301bca?tpId=13&tqId=11177&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -259,7 +259,7 @@ private void backtracking(TreeNode node, int target, ArrayList<Integer> path) {
 
 # 35. 复杂链表的复制
 
-[NowCoder](https://www.nowcoder.com/practice/f836b2c43afc4b35ad6adc41ec941dba?tpId=13&tqId=11178&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/f836b2c43afc4b35ad6adc41ec941dba?tpId=13&tqId=11178&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -327,7 +327,7 @@ public RandomListNode Clone(RandomListNode pHead) {
 
 # 36. 二叉搜索树与双向链表
 
-[NowCoder](https://www.nowcoder.com/practice/947f6eb80d944a84850b0538bf0ec3a5?tpId=13&tqId=11179&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/947f6eb80d944a84850b0538bf0ec3a5?tpId=13&tqId=11179&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -362,7 +362,7 @@ private void inOrder(TreeNode node) {
 
 # 37. 序列化二叉树
 
-[NowCoder](https://www.nowcoder.com/practice/cf7e25aa97c04cc1a68c8f040e71fb84?tpId=13&tqId=11214&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/cf7e25aa97c04cc1a68c8f040e71fb84?tpId=13&tqId=11214&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -402,7 +402,7 @@ private TreeNode Deserialize() {
 
 # 38. 字符串的排列
 
-[NowCoder](https://www.nowcoder.com/practice/fe6b651b66ae47d7acce78ffdd9a96c7?tpId=13&tqId=11180&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/fe6b651b66ae47d7acce78ffdd9a96c7?tpId=13&tqId=11180&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -443,7 +443,7 @@ private void backtracking(char[] chars, boolean[] hasUsed, StringBuilder s) {
 
 # 39. 数组中出现次数超过一半的数字
 
-[NowCoder](https://www.nowcoder.com/practice/e8a1b01a2df14cb2b228b30ee6a92163?tpId=13&tqId=11181&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/e8a1b01a2df14cb2b228b30ee6a92163?tpId=13&tqId=11181&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 解题思路
 
diff --git a/notes/剑指 Offer 题解 - 3~9.md b/notes/剑指 Offer 题解 - 3~9.md
index 305c388b..e07962d1 100644
--- a/notes/剑指 Offer 题解 - 3~9.md	
+++ b/notes/剑指 Offer 题解 - 3~9.md	
@@ -11,7 +11,7 @@
 
 # 3. 数组中重复的数字
 
-[NowCoder](https://www.nowcoder.com/practice/623a5ac0ea5b4e5f95552655361ae0a8?tpId=13&tqId=11203&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/623a5ac0ea5b4e5f95552655361ae0a8?tpId=13&tqId=11203&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -61,7 +61,7 @@ private void swap(int[] nums, int i, int j) {
 
 # 4. 二维数组中的查找
 
-[NowCoder](https://www.nowcoder.com/practice/abc3fe2ce8e146608e868a70efebf62e?tpId=13&tqId=11154&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/abc3fe2ce8e146608e868a70efebf62e?tpId=13&tqId=11154&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -109,7 +109,7 @@ public boolean Find(int target, int[][] matrix) {
 
 # 5. 替换空格
 
-[NowCoder](https://www.nowcoder.com/practice/4060ac7e3e404ad1a894ef3e17650423?tpId=13&tqId=11155&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/4060ac7e3e404ad1a894ef3e17650423?tpId=13&tqId=11155&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -158,7 +158,7 @@ public String replaceSpace(StringBuffer str) {
 
 # 6. 从尾到头打印链表
 
-[NowCoder](https://www.nowcoder.com/practice/d0267f7f55b3412ba93bd35cfa8e8035?tpId=13&tqId=11156&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/d0267f7f55b3412ba93bd35cfa8e8035?tpId=13&tqId=11156&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -237,7 +237,7 @@ public ArrayList<Integer> printListFromTailToHead(ListNode listNode) {
 
 # 7. 重建二叉树
 
-[NowCoder](https://www.nowcoder.com/practice/8a19cbe657394eeaac2f6ea9b0f6fcf6?tpId=13&tqId=11157&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/8a19cbe657394eeaac2f6ea9b0f6fcf6?tpId=13&tqId=11157&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -276,7 +276,7 @@ private TreeNode reConstructBinaryTree(int[] pre, int preL, int preR, int inL) {
 
 # 8. 二叉树的下一个结点
 
-[NowCoder](https://www.nowcoder.com/practice/9023a0c988684a53960365b889ceaf5e?tpId=13&tqId=11210&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/9023a0c988684a53960365b889ceaf5e?tpId=13&tqId=11210&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -327,7 +327,7 @@ public TreeLinkNode GetNext(TreeLinkNode pNode) {
 
 # 9. 用两个栈实现队列
 
-[NowCoder](https://www.nowcoder.com/practice/54275ddae22f475981afa2244dd448c6?tpId=13&tqId=11158&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/54275ddae22f475981afa2244dd448c6?tpId=13&tqId=11158&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
diff --git a/notes/剑指 Offer 题解 - 40~49.md b/notes/剑指 Offer 题解 - 40~49.md
index 7dc925fd..61bbc96d 100644
--- a/notes/剑指 Offer 题解 - 40~49.md	
+++ b/notes/剑指 Offer 题解 - 40~49.md	
@@ -15,7 +15,7 @@
 
 # 40. 最小的 K 个数
 
-[NowCoder](https://www.nowcoder.com/practice/6a296eb82cf844ca8539b57c23e6e9bf?tpId=13&tqId=11182&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/6a296eb82cf844ca8539b57c23e6e9bf?tpId=13&tqId=11182&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 解题思路
 
@@ -97,7 +97,7 @@ public ArrayList<Integer> GetLeastNumbers_Solution(int[] nums, int k) {
 
 # 41.1 数据流中的中位数
 
-[NowCoder](https://www.nowcoder.com/practice/9be0172896bd43948f8a32fb954e1be1?tpId=13&tqId=11216&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/9be0172896bd43948f8a32fb954e1be1?tpId=13&tqId=11216&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -138,7 +138,7 @@ public Double GetMedian() {
 
 # 41.2 字符流中第一个不重复的字符
 
-[NowCoder](https://www.nowcoder.com/practice/00de97733b8e4f97a3fb5c680ee10720?tpId=13&tqId=11207&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/00de97733b8e4f97a3fb5c680ee10720?tpId=13&tqId=11207&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -164,7 +164,7 @@ public char FirstAppearingOnce() {
 
 # 42. 连续子数组的最大和
 
-[NowCoder](https://www.nowcoder.com/practice/459bd355da1549fa8a49e350bf3df484?tpId=13&tqId=11183&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/459bd355da1549fa8a49e350bf3df484?tpId=13&tqId=11183&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -188,7 +188,7 @@ public int FindGreatestSumOfSubArray(int[] nums) {
 
 # 43. 从 1 到 n 整数中 1 出现的次数
 
-[NowCoder](https://www.nowcoder.com/practice/bd7f978302044eee894445e244c7eee6?tpId=13&tqId=11184&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/bd7f978302044eee894445e244c7eee6?tpId=13&tqId=11184&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 解题思路
 
@@ -262,7 +262,7 @@ private int getDigitAtIndex(int index, int place) {
 
 # 45. 把数组排成最小的数
 
-[NowCoder](https://www.nowcoder.com/practice/8fecd3f8ba334add803bf2a06af1b993?tpId=13&tqId=11185&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
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 ## 题目描述
 
@@ -388,7 +388,7 @@ public int longestSubStringWithoutDuplication(String str) {
 
 # 49. 丑数
 
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 ## 题目描述
 
diff --git a/notes/剑指 Offer 题解 - 50~59.md b/notes/剑指 Offer 题解 - 50~59.md
index 5f5acc53..fd065384 100644
--- a/notes/剑指 Offer 题解 - 50~59.md	
+++ b/notes/剑指 Offer 题解 - 50~59.md	
@@ -17,7 +17,7 @@
 
 # 50. 第一个只出现一次的字符位置
 
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+[NowCoder](https://www.nowcoder.com/practice/1c82e8cf713b4bbeb2a5b31cf5b0417c?tpId=13&tqId=11187&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -67,7 +67,7 @@ public int FirstNotRepeatingChar2(String str) {
 
 # 51. 数组中的逆序对
 
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 ## 题目描述
 
@@ -116,7 +116,7 @@ private void merge(int[] nums, int l, int m, int h) {
 
 # 52. 两个链表的第一个公共结点
 
-[NowCoder](https://www.nowcoder.com/practice/6ab1d9a29e88450685099d45c9e31e46?tpId=13&tqId=11189&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/6ab1d9a29e88450685099d45c9e31e46?tpId=13&tqId=11189&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -141,7 +141,7 @@ public ListNode FindFirstCommonNode(ListNode pHead1, ListNode pHead2) {
 
 # 53. 数字在排序数组中出现的次数
 
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+[NowCoder](https://www.nowcoder.com/practice/70610bf967994b22bb1c26f9ae901fa2?tpId=13&tqId=11190&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -178,7 +178,7 @@ private int binarySearch(int[] nums, int K) {
 
 # 54. 二叉查找树的第 K 个结点
 
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+[NowCoder](https://www.nowcoder.com/practice/ef068f602dde4d28aab2b210e859150a?tpId=13&tqId=11215&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 解题思路
 
@@ -206,7 +206,7 @@ private void inOrder(TreeNode root, int k) {
 
 # 55.1 二叉树的深度
 
-[NowCoder](https://www.nowcoder.com/practice/435fb86331474282a3499955f0a41e8b?tpId=13&tqId=11191&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/435fb86331474282a3499955f0a41e8b?tpId=13&tqId=11191&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -224,7 +224,7 @@ public int TreeDepth(TreeNode root) {
 
 # 55.2 平衡二叉树
 
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+[NowCoder](https://www.nowcoder.com/practice/8b3b95850edb4115918ecebdf1b4d222?tpId=13&tqId=11192&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -255,7 +255,7 @@ private int height(TreeNode root) {
 
 # 56. 数组中只出现一次的数字
 
-[NowCoder](https://www.nowcoder.com/practice/e02fdb54d7524710a7d664d082bb7811?tpId=13&tqId=11193&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/e02fdb54d7524710a7d664d082bb7811?tpId=13&tqId=11193&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -284,7 +284,7 @@ public void FindNumsAppearOnce(int[] nums, int num1[], int num2[]) {
 
 # 57.1 和为 S 的两个数字
 
-[NowCoder](https://www.nowcoder.com/practice/390da4f7a00f44bea7c2f3d19491311b?tpId=13&tqId=11195&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/390da4f7a00f44bea7c2f3d19491311b?tpId=13&tqId=11195&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -316,7 +316,7 @@ public ArrayList<Integer> FindNumbersWithSum(int[] array, int sum) {
 
 # 57.2 和为 S 的连续正数序列
 
-[NowCoder](https://www.nowcoder.com/practice/c451a3fd84b64cb19485dad758a55ebe?tpId=13&tqId=11194&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/c451a3fd84b64cb19485dad758a55ebe?tpId=13&tqId=11194&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -360,7 +360,7 @@ public ArrayList<ArrayList<Integer>> FindContinuousSequence(int sum) {
 
 # 58.1 翻转单词顺序列
 
-[NowCoder](https://www.nowcoder.com/practice/3194a4f4cf814f63919d0790578d51f3?tpId=13&tqId=11197&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/3194a4f4cf814f63919d0790578d51f3?tpId=13&tqId=11197&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -408,7 +408,7 @@ private void swap(char[] c, int i, int j) {
 
 # 58.2 左旋转字符串
 
-[NowCoder](https://www.nowcoder.com/practice/12d959b108cb42b1ab72cef4d36af5ec?tpId=13&tqId=11196&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/12d959b108cb42b1ab72cef4d36af5ec?tpId=13&tqId=11196&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -450,7 +450,7 @@ private void swap(char[] chars, int i, int j) {
 
 # 59. 滑动窗口的最大值
 
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+[NowCoder](https://www.nowcoder.com/practice/1624bc35a45c42c0bc17d17fa0cba788?tpId=13&tqId=11217&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
diff --git a/notes/剑指 Offer 题解 - 60~68.md b/notes/剑指 Offer 题解 - 60~68.md
index 51d2b54c..e151d567 100644
--- a/notes/剑指 Offer 题解 - 60~68.md	
+++ b/notes/剑指 Offer 题解 - 60~68.md	
@@ -86,7 +86,7 @@ public List<Map.Entry<Integer, Double>> dicesSum(int n) {
 
 # 61. 扑克牌顺子
 
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+[NowCoder](https://www.nowcoder.com/practice/762836f4d43d43ca9deb273b3de8e1f4?tpId=13&tqId=11198&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -124,7 +124,7 @@ public boolean isContinuous(int[] nums) {
 
 # 62. 圆圈中最后剩下的数
 
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+[NowCoder](https://www.nowcoder.com/practice/f78a359491e64a50bce2d89cff857eb6?tpId=13&tqId=11199&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -174,7 +174,7 @@ public int maxProfit(int[] prices) {
 
 # 64. 求 1+2+3+...+n
 
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+[NowCoder](https://www.nowcoder.com/practice/7a0da8fc483247ff8800059e12d7caf1?tpId=13&tqId=11200&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -198,7 +198,7 @@ public int Sum_Solution(int n) {
 
 # 65. 不用加减乘除做加法
 
-[NowCoder](https://www.nowcoder.com/practice/59ac416b4b944300b617d4f7f111b215?tpId=13&tqId=11201&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/59ac416b4b944300b617d4f7f111b215?tpId=13&tqId=11201&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -218,7 +218,7 @@ public int Add(int a, int b) {
 
 # 66. 构建乘积数组
 
-[NowCoder](https://www.nowcoder.com/practice/94a4d381a68b47b7a8bed86f2975db46?tpId=13&tqId=11204&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/94a4d381a68b47b7a8bed86f2975db46?tpId=13&tqId=11204&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述
 
@@ -243,7 +243,7 @@ public int[] multiply(int[] A) {
 
 # 67. 把字符串转换成整数
 
-[NowCoder](https://www.nowcoder.com/practice/1277c681251b4372bdef344468e4f26e?tpId=13&tqId=11202&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking)
+[NowCoder](https://www.nowcoder.com/practice/1277c681251b4372bdef344468e4f26e?tpId=13&tqId=11202&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github)
 
 ## 题目描述