AllCrazy

今天是我第一次在USACO上做题，虽然这是一个很简单很简单的题目，但是这个传说中USA培养参加IOI参赛选手的OJ，不仅让我有点向往啊。 :P 这个OJ挺让人喜欢的。我很少自己认认真真的想题，也不少的OJ上都只是过过场，最近看了不少退役大牛的博文，顿时让我感到自己是多么的可笑，让我这只井里之蛙深刻的明白自己是多么的肤浅，感受到与其它人的巨大差异，这种差异不是在目前的能力上，而是在思想意识、觉...

Greedy Gift Givers A group of NP (2 ≤ NP ≤ 10) uniquely named friends has decided to exchange gifts of money. Each of these friends might or might not give some money to any or all of the other frien...

Friday the Thirteenth Is Friday the 13th really an unusual event? That is, does the 13th of the month land on a Friday less often than on any other day of the week? To answer this question, wri...

[size=large][align=center]Barn Repair[/align][/size] [size=medium]题目大意：有S个牛栏，其中有C头牛在里面，一些牛栏有牛，一些没有，最大有M块的板子，每块板子的长度可以任意长，用这些板子去拦住所有的牛，使它们都被围住。求最小会有多少牛栏会被围住。 算法分析：isin[S]：表示第i个牛栏里是否有牛。 ...

[size=large][align=center]Calf Flac[/align][/size] To make the programming easier, we keep two copies of the text: the original, and one with the punctuation stripped out. We find the biggest pal...