皮皮虎

摘要： Problem Description The harmonic value of the permutation p1,p2,⋯pn is Mr. Frog is wondering about the permutation whose harmonic value is the strictl 阅读全文

摘要： Problem Description Mr. Frog recently studied how to add two fractions up, and he came up with an evil idea to trouble you by asking you to calculate 阅读全文

摘要： Can you answer these queries? Problem Description A lot of battleships of evil are arranged in a line before the battle. Our commander decides to use 阅读全文

摘要： Just a Hook In the game of DotA, Pudge’s meat hook is actually the most horrible thing for most of the heroes. The hook is made up of several consecut 阅读全文

摘要： DNA Sequence Description It's well known that DNA Sequence is a sequence only contains A, C, T and G, and it's very useful to analyze a segment of DNA 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

摘要： Period Problem Description For each prefix of a given string S with N characters (each character has an ASCII code between 97 and 126, inclusive), we 阅读全文

摘要： Cyclic Nacklace Problem Description CC always becomes very depressed at the end of this month, he has checked his credit card yesterday, without any s 阅读全文

摘要： Number Sequence Problem Description Given two sequences of numbers : a[1], a[2], ...... , a[N], and b[1], b[2], ...... , b[M] (1 <= M <= 10000, 1 <= N 阅读全文

摘要： 免费馅饼 Problem Description 都说天上不会掉馅饼，但有一天gameboy正走在回家的小径上，忽然天上掉下大把大把的馅饼。说来gameboy的人品实在是太好了，这馅饼别处都不掉，就掉落在他身旁的10米范围内。馅饼如果掉在了地上当然就不能吃了，所以gameboy马上卸下身上的背包去接 阅读全文