hofighter的专栏

【题目】 Given an array S of n integers, are there elements a, b, c, and d in S such that a + b + c + d = target? Find all unique quadruplets in the array which gives the sum of target.Note: The solution

[题目] Given 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. For Example: Given nums

【题目1】3Sum Given 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 the sum of zero.Note: The solution set must not con