2016年12月9日
18. 4Sum
摘要： 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 set m... 阅读全文
posted @ 2016-12-09 23:22 copperface 阅读(205) 评论(0) 推荐(0) 编辑