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摘要： Asteroids Description Bessie wants to navigate her spaceship through a dangerous asteroid field in the shape of an N x N grid (1 <= N <= 500). The gri 阅读全文

摘要： D. Persistent Bookcase D. Persistent Bookcase Recently in school Alina has learned what are the persistent data structures: they are data structures t 阅读全文

摘要： Counting Offspring Problem Description You are given a tree, it’s root is p, and the node is numbered from 1 to n. Now define f(i) as the number of no 阅读全文

摘要： MGLAR10 - Growing Strings Gene and Gina have a particular kind of farm. Instead of growing animals and vegetables, as it is usually the case in regula 阅读全文

摘要： Computer Virus on Planet Pandora Problem Description Aliens on planet Pandora also write computer programs like us. Their programs only consist of cap 阅读全文

摘要： D. Vasiliy's Multiset D. Vasiliy's Multiset Author has gone out of the stories about Vasiliy, so here is just a formal task description. You are given 阅读全文

摘要： Keywords Search Problem Description In the modern time, Search engine came into the life of everybody like Google, Baidu, etc.Wiskey also wants to bri 阅读全文

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摘要： Euclid's Game Description Two players, Stan and Ollie, play, starting with two natural numbers. Stan, the first player, subtracts any positive multipl 阅读全文

摘要： Calendar Game Problem Description Adam and Eve enter this year’s ACM International Collegiate Programming Contest. Last night, they played the Calenda 阅读全文