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Nim Game (E) 题目 You are playing the following Nim Game with your friend: There is a heap of stones on the table, each time one of you take turns to re 阅读全文
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Word Pattern (E) 题目 Given a pattern and a string str, find if str follows the same pattern. Here follow means a full match, such that there is a bijec 阅读全文
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Peeking Iterator (M) 题目 Given an Iterator class interface with methods: next() and hasNext(), design and implement a PeekingIterator that support the 阅读全文