摘要:
题意: 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 阅读全文
posted @ 2016-08-12 22:12
wangxiaobao1114
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摘要:
题意: Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the tel 阅读全文
posted @ 2016-08-12 22:06
wangxiaobao1114
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