摘要： LeetCode 18 4Sum Question 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 阅读全文

摘要： LeetCode 16 3Sum Closest Question Given an array S of n integers, find three integers in S such that the sum is closest to a given number, target. Ret 阅读全文

摘要： LeetCode 15 3Sum Question 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 a 阅读全文