Medium FB tag naive方法：O(n2) class Solution { public boolean checkSubarraySum(int[] nums, int k) { if (nums == …

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 …

题目描述 https://leetcode.com/problems/hamming-distance/description/ The Hamming distance between two integers is …

Given two binary strings, return their sum (also a binary string). For example,a = "11"b = "1"Return…

题目描述 Reverse a linked list from position m to n. Do it in-place and in one-pass. For example: Given 1->2-&g…

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:…

欢迎fork and star：Nowcoder-Repository-github 129. Sum Root to Leaf Numbers 题目 Given a binary tree containing dig…

  Given an array of numbers nums, in which exactly two elements appear only once and all the other e…

  Given a string which consists of lowercase or uppercase letters, find the length of the longest palindr…