本文首发于我的个人博客：尾尾部落 题目描述 求1+2+3+…+n，要求不能使用乘除法、for、while、if、else、switch、case等关键字及条件判断语句（A?B:C）。 解题思路 累加不能用循环…

本文首发于我的个人博客：尾尾部落 题目描述 在一个长度为n的数组里的所有数字都在0到n-1的范围内。 数组中某些数字是重复的，但不知道有几个数字是重复的。也不知道每个数字重复几次。请找出数组中任意一个重复的数字。 例如，…

链接：https://leetcode.com/problems/max-area-of-island/description/ 难度：Easy 题目：695. Max Area of Island Given a no…

题目描述 Design a data structure that supports the following two operations: void addWord(word) bool search(word) …

转载请注明出处： http://egoistk21.xyz/2016/09/29/ZigZag Conversion/ 锯齿形转换 字符串“PAYPALISHIRING”以给定数字的行数被写入锯齿形图案： P A H N…

111. Minimum Depth of Binary Tree 题目: https://leetcode.com/problems/minimum-depth-of-binary-tree/ 难度: Easy 注意l…

Easy Give an integer array，find the longest increasing continuous subsequence in this array. An increasing con…

Given a collection of integers that might contain duplicates, nums, return all possible subsets. Note: The sol…

题目描述 You are a product manager and currently leading a team to develop a new product. Unfortunately, the lates…

Find the Duplicate Number Given an array nums containing n + 1 integers where each integer is between 1 and n …

Given a roman numeral, convert it to an integer. Input is guaranteed to be within the range from 1 to 3999. Su…

Given a collection of integers that might contain duplicates, S, return all possible subsets. Note: Eleme…