We are given head, the head node of a linked list containing unique integer values. We a…

题目： Say you have an array for which the ith element is the price of a given stock on day i. Des…

题目描述 Follow up for “Unique Paths”: Now consider if some obstacles are added to the grids. How many unique path…

1. 题目 Given a collection of candidate numbers (C) and a target number (T), find all unique combinations in C w…

题目地址：https://leetcode-cn.com/probl…题目描述：给定一个二维的矩阵，包含 ‘X’ 和 ‘O’（字母 O）。 找到所有被 R…

Given a collection of intervals, merge all overlapping intervals. For example, Given [1,3],[2,6],[8,10],[…

Given a string containing just the characters '(' and ')', find the length of the longest valid…

Given a sorted array, remove the duplicates in place such that each element appear only once and ret…

文章作者：Tyan 博客：noahsnail.com  |  CSDN  |  简书 1. 问题描述 Given an encoded string, return it̵…

  Given an array of integers, return indices of the two numbers such that they add up to a spec…

  Two elements of a binary search tree (BST) are swapped by mistake. Recover the tree without changing it…

  Given a positive integer n, return the number of all possible attendance records with length n, which w…