From 1c2b8c5ebb8faea5298e53672bf08b78be1c7c89 Mon Sep 17 00:00:00 2001 From: xiongraorao Date: Sun, 9 Sep 2018 21:57:58 +0800 Subject: [PATCH] =?UTF-8?q?=E4=BA=AC=E4=B8=9C?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .../interview/bytedance/th9/t1/Main.java | 43 ++++++++++ .../interview/bytedance/th9/t2/Main.java | 52 ++++++++++++ .../interview/bytedance/th9/t3/Main.java | 55 +++++++++++++ .../interview/bytedance/th9/t4/Main.java | 71 +++++++++++++++++ .../interview/bytedance/th9/t5/Main.java | 60 ++++++++++++++ .../java/com/raorao/interview/jd/t1/Main.java | 79 +++++++++++++++++++ .../java/com/raorao/interview/jd/t2/Main.java | 61 ++++++++++++++ 7 files changed, 421 insertions(+) create mode 100644 code/src/main/java/com/raorao/interview/bytedance/th9/t1/Main.java create mode 100644 code/src/main/java/com/raorao/interview/bytedance/th9/t2/Main.java create mode 100644 code/src/main/java/com/raorao/interview/bytedance/th9/t3/Main.java create mode 100644 code/src/main/java/com/raorao/interview/bytedance/th9/t4/Main.java create mode 100644 code/src/main/java/com/raorao/interview/bytedance/th9/t5/Main.java create mode 100644 code/src/main/java/com/raorao/interview/jd/t1/Main.java create mode 100644 code/src/main/java/com/raorao/interview/jd/t2/Main.java diff --git a/code/src/main/java/com/raorao/interview/bytedance/th9/t1/Main.java b/code/src/main/java/com/raorao/interview/bytedance/th9/t1/Main.java new file mode 100644 index 00000000..8c7d99dd --- /dev/null +++ b/code/src/main/java/com/raorao/interview/bytedance/th9/t1/Main.java @@ -0,0 +1,43 @@ +package com.raorao.interview.bytedance.th9.t1; + +import java.util.HashMap; +import java.util.Map; +import java.util.Scanner; + +/** + * . + * + * @author Xiong Raorao + * @since 2018-09-09-10:01 + */ +public class Main { + + public static void main(String[] args) { + Scanner scanner = new Scanner(System.in); + String input = scanner.nextLine(); + System.out.print(process(input)); + } + + private static int process(String s){ + if (s == null || s.length() == 0) { + return 0; + } + Map map = new HashMap<>(); + int result = 1; + int count = 0; + for (int i = 0; i < s.length(); i++) { + if (!map.containsKey(s.charAt(i))) { + map.put(s.charAt(i), i); + count++; + } else { + count = 0; + i = map.get(s.charAt(i)); + map.clear(); + } + if (result < count) { + result = count; + } + } + return result; + } +} \ No newline at end of file diff --git a/code/src/main/java/com/raorao/interview/bytedance/th9/t2/Main.java b/code/src/main/java/com/raorao/interview/bytedance/th9/t2/Main.java new file mode 100644 index 00000000..4ff1dd71 --- /dev/null +++ b/code/src/main/java/com/raorao/interview/bytedance/th9/t2/Main.java @@ -0,0 +1,52 @@ +package com.raorao.interview.bytedance.th9.t2; + +import java.util.Scanner; + +/** + * . + * + * @author Xiong Raorao + * @since 2018-09-09-10:11 + */ +public class Main { + + private static int[][] matrix; + private static int[][] direction = {{0, 1}, {0, -1}, {1, 0}, {-1, 0}}; + private static int m; + + public static void main(String[] args) { + Scanner scanner = new Scanner(System.in); + m = scanner.nextInt(); + matrix = new int[m][m]; + for (int i = 0; i < m; i++) { + for (int j = 0; j < m; j++) { + matrix[i][j] = scanner.nextInt(); + } + } + + int count = 0; + if(m == 0){ + System.out.println(0); + } + for (int i = 0; i= m || j < 0 || j >= m || matrix[i][j] == 0){ + return; + } + matrix[i][j] = 0; + for (int[] d : direction){ + dfs(i+d[0], j+ d[1]); + } + } +} diff --git a/code/src/main/java/com/raorao/interview/bytedance/th9/t3/Main.java b/code/src/main/java/com/raorao/interview/bytedance/th9/t3/Main.java new file mode 100644 index 00000000..1c6c9d4d --- /dev/null +++ b/code/src/main/java/com/raorao/interview/bytedance/th9/t3/Main.java @@ -0,0 +1,55 @@ +package com.raorao.interview.bytedance.th9.t3; + +import java.util.ArrayList; +import java.util.List; +import java.util.Scanner; + +/** + * . + * + * @author Xiong Raorao + * @since 2018-09-09-10:33 + */ +public class Main { + + public static void main(String[] args) { + Scanner scanner = new Scanner(System.in); + String input = scanner.nextLine(); + System.out.println(restoreIpAddresses(input)); + } + + public static int restoreIpAddresses(String s) { + List ret = new ArrayList<>(); + process(0, new StringBuilder(), ret, s); + return ret.size(); + } + + /** + * @param k 表示当前已经分割的ip段 + */ + private static void process(int k, StringBuilder sb, List ret, String s) { + + if (k == 4 || s.length() == 0) { + if (k == 4 && s.length() == 0) { + ret.add(sb.toString()); + } + return; + } + + for (int i = 0; i < s.length() && i <= 2; i++) { + if (i != 0 && s.charAt(0) == '0') { + break; + } + String part = s.substring(0, i + 1); + if (Integer.valueOf(part) <= 255) { + if (sb.length() != 0) { + part = "." + part; + } + sb.append(part); + process(k + 1, sb, ret, s.substring(i + 1)); + sb.delete(sb.length() - part.length(), sb.length()); + } + } + + } +} diff --git a/code/src/main/java/com/raorao/interview/bytedance/th9/t4/Main.java b/code/src/main/java/com/raorao/interview/bytedance/th9/t4/Main.java new file mode 100644 index 00000000..0a9ed83e --- /dev/null +++ b/code/src/main/java/com/raorao/interview/bytedance/th9/t4/Main.java @@ -0,0 +1,71 @@ +package com.raorao.interview.bytedance.th9.t4; + +import java.util.Scanner; + +/** + * . + * + * @author Xiong Raorao + * @since 2018-09-09-10:38 + */ +public class Main { + + public static void main(String[] args) { + Scanner scanner = new Scanner(System.in); + int n = scanner.nextInt(); + int[] nums = new int[n]; + for (int i = 0; i < n; i++) { + nums[i] = scanner.nextInt(); + } + + if(valid(nums)){ + System.out.println(1); + }else { + System.out.println(0); + } + + } + + private static boolean valid(int[] data){ + boolean isUtf8 = false;// 当前num是否在一个验证的字符中 + int times = 0; + for (int i = 0; i < data.length; i++) { + if(isUtf8==false){ + times = check(data[i]);//当前编码需要多少个10 + if (times == -2 || times == 0)//非编码 + return false; + if(times>0)//后面需要跟多少个10编码 + isUtf8=true; + }else{ + if(times>0&&check(data[i])==0)//是10编码 + times--; + else + return false; + if(times==0) + isUtf8=false; + } + } + return times>0?false:true; + } + + public static int check(int n) { + if ((128 & n) == 0) { + return -1; + } + if ((192 & n) == 128)//10 + { + return 0; + } + if ((224 & n) == 192) { + return 1; + } + if ((240 & n) == 224) { + return 2; + } + if ((248 & n) == 240) { + return 3; + } + return -2; + } + +} diff --git a/code/src/main/java/com/raorao/interview/bytedance/th9/t5/Main.java b/code/src/main/java/com/raorao/interview/bytedance/th9/t5/Main.java new file mode 100644 index 00000000..a9e5cac7 --- /dev/null +++ b/code/src/main/java/com/raorao/interview/bytedance/th9/t5/Main.java @@ -0,0 +1,60 @@ +package com.raorao.interview.bytedance.th9.t5; + +import java.util.Scanner; + +/** + * . + * + * @author Xiong Raorao + * @since 2018-09-09-11:07 + */ +public class Main { + + public static void main(String[] args) { + Scanner scanner = new Scanner(System.in); + int n = scanner.nextInt(); + int m = scanner.nextInt(); + int[][] matrix = new int[n][n]; + for (int i = 0; i < n; i++) { + for (int j = 0; j < n; j++) { + if (i == j) { + matrix[i][j] = 0; + } else { + matrix[i][j] = -1; + } + } + } + for (int i = 0; i < m; i++) { + int a = scanner.nextInt(); + int b = scanner.nextInt(); + matrix[a - 1][b - 1] = 0; + } + for (int k = 0; k < n; k++) { + for (int i = 0; i < n; i++) { + for (int j = 0; j < n; j++) { + if (matrix[i][j] < 0 && matrix[i][k] + matrix[k][j] == 0) { + matrix[i][j] = 0; + } + } + } + } + + int ret = 0; + for (int j = 0; j < n; j++) { + int i; + for (i = 0; i < n; i++) { + if (matrix[i][j] < 0) { + break; + } + } + if (i == n) { + ret++; + } + } + + System.out.println(ret); + + } + + +} diff --git a/code/src/main/java/com/raorao/interview/jd/t1/Main.java b/code/src/main/java/com/raorao/interview/jd/t1/Main.java new file mode 100644 index 00000000..1ab14c1f --- /dev/null +++ b/code/src/main/java/com/raorao/interview/jd/t1/Main.java @@ -0,0 +1,79 @@ +package com.raorao.interview.jd.t1; + +import java.util.ArrayList; +import java.util.HashSet; +import java.util.List; +import java.util.Scanner; +import java.util.Set; + +/** + * . + * + * @author Xiong Raorao + * @since 2018-09-09-20:29 + */ +public class Main { + + public static void main(String[] args) { + Scanner sc = new Scanner(System.in); + int t = sc.nextInt(); + for (int i = 0; i < t; i++) { + int n = sc.nextInt(); + int m = sc.nextInt(); + int[][] g = new int[n + 1][n + 1]; + for (int j = 0; j < m; j++) { + int p = sc.nextInt(); + int q = sc.nextInt(); + g[p][q] = 1; + g[q][p] = 1; + } + if (judge(g, n)) { + System.out.println("Yes"); + } else { + System.out.println("No"); + } + } + } + + public static boolean judge(int[][] g, int n) { + Set> sets = new HashSet<>(); + for (int i = 1; i <= n; i++) { + for (int j = 1; j <= n; j++) { + if (i == j) { + continue; + } + if (g[i][j] == 0) { + boolean exist = false; + for (Set set : sets) { + if (set.contains(i) || set.contains(j)) { + set.add(i); + set.add(j); + exist = true; + break; + } + } + if (!exist) { + Set s = new HashSet<>(); + s.add(i); + s.add(j); + sets.add(s); + } + } + } + } + for (Set set : sets) { + List list = new ArrayList<>(set); + for (int i = 0; i < list.size(); i++) { + for (int j = 0; j < list.size(); j++) { + int p = list.get(i); + int q = list.get(j); + if (g[p][q] == 1) { + return false; + } + } + } + } + return true; + } + +} diff --git a/code/src/main/java/com/raorao/interview/jd/t2/Main.java b/code/src/main/java/com/raorao/interview/jd/t2/Main.java new file mode 100644 index 00000000..5e85b7a1 --- /dev/null +++ b/code/src/main/java/com/raorao/interview/jd/t2/Main.java @@ -0,0 +1,61 @@ +package com.raorao.interview.jd.t2; + +import java.util.ArrayList; +import java.util.HashSet; +import java.util.List; +import java.util.Scanner; +import java.util.Set; + +/** + * . + * + * @author Xiong Raorao + * @since 2018-09-09-20:01 + */ +public class Main { + + private static List

list = new ArrayList<>(); + public static void main(String[] args) { + Scanner scanner = new Scanner(System.in); + int n = scanner.nextInt(); + for (int i = 0; i < n; i++) { + int a = scanner.nextInt(); + int b = scanner.nextInt(); + int c = scanner.nextInt(); + list.add(new P(a, b, c)); + } + Set set = new HashSet<>(); + for (int i = 0; i < list.size(); i++) { + for (int j = i + 1; j < list.size(); j++) { + if (compare(list.get(i), list.get(j))) { + set.add(i); + list.remove(i); + } + if (compare(list.get(j), list.get(i))) { + set.add(j); + list.remove(i); + } + } + } + System.out.println(set.size()); + + } + + public static boolean compare(P p1, P p2) { + return (p1.a < p2.a) && (p1.b < p2.b) && (p1.c < p2.c); + } + + static class P { + + int a; + int b; + int c; + + public P(int a, int b, int c) { + this.a = a; + this.b = b; + this.c = c; + } + } +} +