Count the number of segments in a string, where a segment is defined to be a contiguous sequence of non…

  Given a string, sort it in decreasing order based on the frequency of characters. Example 1: Input: "tr…

  Suppose you have N integers from 1 to N. We define a beautiful arrangement as an array that i…

  Given a positive 32-bit integer n, you need to find the smallest 32-bit intege…

  Given a positive integer, check whether it has alternating bits: namely, if two adjacent bits will alwa…

Given a string, you need to reverse the order of characters in each word within a sentence while still preserv…

题目地址：https://leetcode-cn.com/probl…题目描述：在一个由 0 和 1 组成的二维矩阵内，找到只包含 1 的最大正方形，并返回其面积。 示例: 输入: 1 0 1 0 01 0 …

1 题目描述 Divide two integers without using multiplication, division and mod operator. If it is overflow, return …

232. Implement Queue using Stacks 题目: https://leetcode.com/problems/implement-queue-using-stacks/ 难度: Easy 这个题…

Problem Description A number sequence is defined as follows: f(1) = 1, f(2) = 1, f(n) = (A * f(n - 1) + B * f(…

Given a string s1, we may represent it as a binary tree by partitioning it to two non-empty substrings recursi…

61. Rotate List 题目 Given a list, rotate the list to the right by k places, where k is non-negative. Example: G…