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题解

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o(n)解法

import java.util.*; public class Solution { public ArrayList<Integer> FindNumbersWithSum(int [] array,int sum) { ArrayList<Integ...

2020-05-16

0 603

切割字符串拼接

public class Solution { public String LeftRotateString(String str,int n) { if (str == null || str.length() < 1) { return ""...

string

2020-05-16

0 559

超时解法

public class Solution { public int GetUglyNumber_Solution(int index) { int count = 0; int num = 0; while (count < index) {...

2020-05-16

0 428

基于树的深度来判断平衡二叉树

public class Solution { public boolean IsBalanced_Solution(TreeNode root) { if (root == null) { return true; } ...

二叉树深度

2020-05-06

0 538

java循环

import java.util.ArrayList; /** public class TreeNode { int val = 0; TreeNode left = null; TreeNode right = null; public TreeNode(int...

2020-05-06

0 458

空间换时间的o（n）思路

import java.util.*; public class Solution { public void reOrderArray(int [] array) { if (array == null || array.length < 1) { ...

2020-01-06

0 463