摘要:
Problem Description A robot has been programmed to follow the instructions in its path. Instructions for the next direction the robot is to move are l 阅读全文
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Problem Description 数论中有许多猜想尚未解决,其中有一个被称为“角谷猜想”的问题,该问题在五、六十年代的美国多个著名高校中曾风行一时,这个问题是这样描述的:任何一个大于一的自然数,如果是奇数,则乘以三再加一;如果是偶数,则除以二;得出的结果继续按照前面的规则进行运算,最后必定得到 阅读全文
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Problem Description There is a tree(the tree is a connected graph which contains n points and n−1 edges),the points are labeled from 1 to n,which edge 阅读全文