Given a string S and a string T, count the number of distinct subsequences of T&nbs…

题目地址：https://leetcode-cn.com/probl…题目描述：给定一个范围在 1 ≤ a[i] ≤ n ( n = 数组大小 ) 的 整型数组，数组中的元素一些出现了两次，另一些只出现一次。…

  An image is represented by a 2-D array of integers, each integer representing the pixel value…

题目： Given a string  S , find the longest palindromic substring in  S . You may assume that the maxim…

题目描述 Given a sorted array of integers, find the starting and ending position of a given target value. Your alg…

Binary Tree Longest Consecutive Sequence Given a binary tree, find the length of the longest consecutive seque…

  Given an array containing n distinct numbers taken from 0, 1, 2, ..., n, find the one that is missing f…

  Given an integer, write an algorithm to convert it to hexadecimal. For negative integer, two’s com…

题目： Given two sorted integer arrays A and B, merge B into A as one sorted array. Note: You may assume that A h…

Contains Duplicate I Given an array of integers, find if the array contains any duplicates. Your function shou…

  Design a Snake game that is played on a device with screen size = width x height. Play the game online …

  Given a binary tree, return the vertical order traversal of its nodes’ values. (ie, from top to b…