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题目链接：https://leetcode.com/problems/3sum/#/descriptionGiven an array S of n integers, are there elements a, b, c in S such that a + b + c = 0? Find all unique triplets in the array which gives

题目链接： http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemId=3492PrototypeTime Limit: 1 Second      Memory Limit: 32768 KBPrototype is a 3D game which allow you to contro

题目描述：Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.For example,"A man, a plan, a canal: Panama" is a palindrome."race a car"