2018年4月7日
hdu 2841 Visible Trees（容斥）
摘要： 原文链接 There are many trees forming a m * n grid, the grid starts from (1,1). Farmer Sherlock is standing at (0,0) point. He wonders how many trees he c 阅读全文
posted @ 2018-04-07 22:25 Veritas_des_Liberty 阅读(208) 评论(0) 推荐(0)
Relatives（容斥）
摘要： Relatives Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 15708 Accepted: 7966 Description Given n, a positive integer, how many positive i 阅读全文
posted @ 2018-04-07 22:00 Veritas_des_Liberty 阅读(340) 评论(0) 推荐(0)