摘要: 原题: http://acm.hdu.edu.cn/showproblem.php?pid=5651 y=n!x1!x2!x3!⋯xk!y=n!x1!x2!x3!⋯xk!y=n!x1!x2!x3!⋯xk!y=n!x1!x2!x3!⋯xk! 阅读全文
posted @ 2016-03-29 09:49 Esieve 阅读(351) 评论(0) 推荐(0)