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K-wolf Number Problem Description Alice thinks an integer x is a K-wolf number, if every K adjacent digits in decimal representation of x is pairwised 阅读全文
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Two Problem Description Alice gets two sequences A and B. A easy problem comes. How many pair of sequence A' and sequence B' are same. For example, {1 阅读全文
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2152: 聪聪可可 Description 聪聪和可可是兄弟俩，他们俩经常为了一些琐事打起来，例如家中只剩下最后一根冰棍而两人都想吃、两个人都想玩儿电脑（可是他们家只有一台电脑）……遇到这种问题，一般情况下石头剪刀布就好了，可是他们已经玩儿腻了这种低智商的游戏。他们的爸爸快被他们的争吵烦死了，所以 阅读全文
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Lucky Problem Description WLD is always very lucky.His secret is a lucky number K.k is a fixed odd number. Now he meets a stranger with N numbers:a1,a 阅读全文
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NPY and girls Problem Description NPY's girlfriend blew him out!His honey doesn't love him any more!However, he has so many girlfriend candidates.Beca 阅读全文
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3289: Mato的文件管理 Description Mato同学从各路神犇以各种方式（你们懂的）收集了许多资料，这些资料一共有n份，每份有一个大小和一个编号。为了防止他人偷拷，这些资料都是加密过的，只能用Mato自己写的程序才能访问。Mato每天随机选一个区间[l,r]，他今天就看编号在此区间内 阅读全文
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Object Clustering Description We have N (N ≤ 10000) objects, and wish to classify them into several groups by judgement of their resemblance. To simpl 阅读全文
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F - Cycling Roads F - Cycling Roads Description When Vova was in Shenzhen, he rented a bike and spent most of the time cycling around the city. Vova w 阅读全文
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Boatherds Description Boatherds Inc. is a sailing company operating in the country of Trabantustan and offering boat trips on Trabantian rivers. All t 阅读全文
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Distance Statistics Description Frustrated at the number of distance queries required to find a reasonable route for his cow marathon, FJ decides to a 阅读全文