2016年1月6日

4Sum

摘要： Given an arraySofnintegers, are there elementsa,b,c, anddinSsuch thata+b+c+d= target? Find all unique quadruplets in the array which gives the sum of ... 阅读全文

posted @ 2016-01-06 22:24 walkwalkwalk 阅读(173) 评论(0) 推荐(0) 编辑

Letter Combinations of a Phone Number

摘要： Given a digit string, return all possible letter combinations that the number could represent.A mapping of digit to letters (just like on the telephon... 阅读全文

posted @ 2016-01-06 20:36 walkwalkwalk 阅读(163) 评论(0) 推荐(0) 编辑

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