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摘要： There are N cities in our country, and M one-way roads connecting them. Now Little Tom wants to make several cyclic tours, which satisfy that, each cy 阅读全文

摘要： Jimmy invents an interesting card game. There are N cards, each of which contains a string Si. Jimmy wants to stick them into several circles, and eac 阅读全文

摘要： On a grid map there are n little men and n houses. In each unit time, every little man can move one unit step, either horizontally, or vertically, to 阅读全文

摘要： 今天下午看了一下午的km算法，因为大佬的博客介绍非常简短，所以自己一直没有弄清楚一些细节问题，好在回来翻到了一个比较好的csdn专栏，介绍比较详细，自己才算弄懂了很多疑惑的地方，二分图最佳完美匹配。 总结一下算法： 思想：km算法就是改变一些可行点的标号，不断增加图中可行边的总数，直到图中存在仅由可 阅读全文

摘要： 传说在遥远的地方有一个非常富裕的村落,有一天,村长决定进行制度改革：重新分配房子。 这可是一件大事,关系到人民的住房问题啊。村里共有n间房间,刚好有n家老百姓,考虑到每家都要有房住（如果有老百姓没房子住的话，容易引起不安定因素），每家必须分配到一间房子且只能得到一间房子。 另一方面,村长和另外的村领 阅读全文

摘要： 又开始瞎折腾了，不过总得为自己刷题之外的生活找点乐子吧，今天搜算法看到了一个不错的网址，先收藏起来，晚上回去弄 1：如何添加flagcounter：http://blog.sina.com.cn/s/blog_5f1f4dc70100eudf.html 2：制定访问量的页面:http://www.a 阅读全文

摘要： You are given a 2D board where in some cells there are gold. You want to fill the board with 2 x 1 dominoes such that all gold are covered. You may us 阅读全文

摘要： You run a marriage media. You take some profiles for men and women, and your task is to arrange as much marriages as you can. But after reading their 阅读全文

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

摘要： Consider a town where all the streets are one-way and each street leads from one intersection to another. It is also known that starting from an inter 阅读全文