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Given two strings a and b of equal length, what's the longest string (s) that can be constructed such that it is a child of both? A string x is said t 阅读全文
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Some viruses replicate by replacing a piece of DNA in a living cell with a piece of DNA that the virus carries with it. This makes the cell start to p 阅读全文
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题目： After years of success with a single-button mouse, a well known computer company has decided to offer a similarly simplified interface for the key 阅读全文
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题目： Change one letter of the name. Add a letter to the end of the name. Input Output Output the number of changes they need to make. Limits The length 阅读全文
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题目： The gaming company Sandstorm is developing an online two player game. You have been asked to implement the ranking system. All players have a rank 阅读全文
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这道题的话，我拿到题是有点懵圈的，如果要我自己判断的话，我也要自己在纸上建立坐标轴然后一一将点标出，后用肉眼判断。这个用代码实现嘛…… 后来就只能参考大神们的算法啦。 判断方法： 向量a=(x1,y1),b=(x2,y2)； 向量的叉积a×b=x1*y2-x2*y1; 当a×b>0时，b在a的逆时针 阅读全文
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题目： The multiplication puzzle is played with a row of cards, each containing a single positive integer. During the move player takes one card out of t 阅读全文