2013年4月6日
Handshaking<DP>
摘要： 链接:http://soj.me/show_problem.php?pid=1007&cid=969N(Nis even) persons stand around a round table. They make handshakes. Every person shakes the hand with one and exactly one of other persons. All handshakes are made at the same time. Your task is to calculate how many ways of handshaking can be 阅读全文
posted @ 2013-04-06 20:56 淡墨æ末央 阅读(426) 评论(0) 推荐(0)