题目描述： 给定一个只包括 ‘(‘，’)’，'{‘，’}’，'[‘，’]’ 的字符串，判断字符串是否…

伪装成LIS的简单题目 class Solution(object): def findLengthOfLCIS(self, nums): """ :type nums: List[int] :rtype: int ""…

问题描述 We define the Perfect Number is a positive integer that is equal to the sum of all its positive divisors …

文章作者：Tyan 博客：noahsnail.com  |  CSDN  |  简书 1. 问题描述 Given a binary tree, return the inorder…

无重复字符的最长子串 给定一个字符串，找出不含有重复字符的最长子串的长度。 输入: "abcabcbb" 输出: 3 解释: 无重复字符的最长子串是 "abc"，其长度为 3。 输入: "bbbbb" 输出: 1 解释:…

Analysis Brute-force solution Apparently, a straightforward brute-force solution would be to store every {key,…

/* 125. Valid Palindrome My Submissions Question Total Accepted: 94559 Total Submissions: 401331 Difficulty: E…

My code: import java.util.Arrays; import java.util.List; public class Solution { class Node { int val = 0; int…

Given a sorted array of integers nums and integer values a, b and c. Apply a function of the form f(x) = ax2 +…

Analysis Oveiously, in order to solve this question, we have to iterate through all of the possible cases at l…

链接：https://leetcode.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal/description/ 难度：Med…

Problem More LeetCode Discussions Given a string s, return all the palindromic permutations (without duplicate…