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全部文章 / 题解（共22篇）

题解 | #买卖股票的最好时机(一)#

import java.util.*; public class Solution { /** * * @param prices int整型一维数组 * @return int整型 */ public int maxProfit (i...

Java

2021-11-30

0 456

题解 | #两个链表生成相加链表#

import java.util.*; /* * public class ListNode { * int val; * ListNode next = null; * } */ public class Solution { /** * * @...

Java

2021-11-27

0 325

题解 | #二叉树中和为某一值的路径(二)#

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

Java

2021-11-27

0 418

题解 | #最长回文子串#

import java.util.*; public class Solution { /** * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可 * * * @param A string字符串 * @re...

Java

2021-11-27

0 394

题解 | #连续子数组的最大和#

public class Solution { public int FindGreatestSumOfSubArray(int[] array) { int[] dp = new int[array.length]; dp[0] = ar...

Java

2021-11-27

0 283

题解 | #实现二叉树先序，中序和后序遍历#

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

Java

2021-11-26

0 371

题解 | #跳台阶#

public class Solution { public int jumpFloor(int target) { if(target <= 1) return 1; return jumpFloor(target-1)+jumpFloor(targe...

Java

2021-11-26

0 343

题解 | #求二叉树的层序遍历#

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

Java

2021-11-26

0 396

题解 | #用两个栈实现队列#

import java.util.Stack; public class Solution { Stack<Integer> stack1 = new Stack<Integer>(); Stack<Integer> stack2 = new S...

Java

2021-11-26

0 318

题解 | #设计LRU缓存结构#

import java.util.*; public class Solution { Map<Integer, Integer> map; int capacity; /** * lru design * @param operators...

Java

2021-11-26

0 472