Update Leetcode 题解.md

修改矩阵路径代码错误，难以置信这么多人star的项目有这种错误

notes/Leetcode 题解.md

@@ -2552,13 +2552,21 @@ public int minPathSum(int[][] grid) {
         for(int i =0;i<m;i++) {
             for(int j=0;j<n;j++){
                 if(i==0) {
-                dp[j] = dp[j - 1];
-            } else {
-                dp[j] = Math.min(dp[j - 1], dp[j]);
+                    if(j==0) {
+                        dp[j] = grid[i][j];
                     }
-            dp[j] += grid[i][j];
+                    else {
+                    dp[j]=dp[j-1] + grid[i][j];
+                    }
+                }else if(j==0) {
+                    dp[j] = dp[j] + grid[i][j];
+                }
+                else{
+                dp[j] = Math.min(dp[j],dp[j-1])+grid[i][j];
                 }
             }
+        }
+        
         return dp[n-1];
     }
 ```