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题目描述 Given a list of words and two words word1 and word2, return the sho...

iOS 获取当前正在显示的ViewController,方法有如下几种 1. 从UIWindow中获取 2. 从UIView里面获取 3. 从U...

题目描述 Two Sum（两数之和） Given an array of integers, return indices of the two...