#面试刷题
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First Error Version
代码库的版本号是从 1 到 n 的整数。某一天,有人提交了错误版本的代码,因此造成自身及之后版本的代码在单元测试中均出错。请找出第一个错误的版本号。
Group Anagrams
Write a method to sort an array of strings so that all the anagrams are next to each other
Inverted Index
A library is trying to build up a smart computer-aided look up system: user may input a list of key words, and