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Two SumGiven an array of integers, return indices of the two numbers such that they add up to a specific target.You may assume that each input would have exactly one solution.Example:Giv

Given numRows, generate the first numRows of Pascal's triangle.For example, given numRows = 5,Return[ [1], [1,1], [1,2,1], [1,3,3,1], [1,4,6,4,1]]Python:#coding:utf-8class

Given a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLinkNode *next; }Populate each next pointer to point to its next right node. If there

Given a string S and a string T, count the number of distinct subsequences ofT in S.A subsequence of a string is a new string which is formed from the original string by deleting some (can be none

Given a binary tree, flatten it to a linked list in-place.For example,Given 1 / \ 2 5 / \ \ 3 4 6The flattened tree should look like: 1 \

Given a binary tree and a sum, find all root-to-leaf paths where each path's sum equals the given sum.For example:Given the below binary tree and sum = 22, 5 / \

java版:class TreeNode{ int val; TreeNode left; TreeNode right; void TreeNode(int val){ this.val=val; } }public class Solution{

16. 3Sum ClosestTotal Accepted: 82615 Total Submissions: 279812 Difficulty: MediumGiven an array S of n integers, find three integers in S such that the sum is closest to a given n

3SumTotal Accepted: 125606 Total Submissions: 653184 Difficulty: MediumGiven an array S of n integers, are there elements a,b, c in S such that a + b + c = 0? Find all uniq

Longest Common PrefixTotal Accepted: 107085 Total Submissions: 371911 Difficulty: EasyWrite a function to find the longest common prefix string amongst an array of strings.

Container With Most WaterTotal Accepted: 82889 Total Submissions: 236099 Difficulty: MediumGiven n non-negative integers a1, a2, ...,an, where each represents a point at co

Palindrome NumberTotal Accepted: 131143 Total Submissions: 406290 Difficulty: EasyDetermine whether an integer is a palindrome. Do this without extra space.Java:public

Reverse IntegerTotal Accepted: 147726 Total Submissions: 622694 Difficulty: EasyReverse digits of an integer.Example1: x = 123, return 321Example2: x = -123, return -321

Longest Palindromic SubstringTotal Accepted: 115663 Total Submissions: 493295 Difficulty: MediumGiven a string S, find the longest palindromic substring in S. You may assume

Longest Substring Without Repeating CharactersTotal Accepted: 159876 Total Submissions: 710693 Difficulty: MediumGiven a string, find the length of the longest substring with

Add Two NumbersTotal Accepted: 153367 Total Submissions: 644131 Difficulty: MediumYou are given two linked lists representing two non-negative numbers. The digits are stored

Given an index k, return the kth row of the Pascal's triangle.For example, given k = 3,Return [1,3,3,1].Python:#coding:utf-8class Solution: def PascalTriangleii(self,k):