2018年12月5日
G - Visible Trees （数学，容斥定理）
摘要： G - Visible TreesThere are many trees forming a m * n grid, the grid starts from (1,1). Farmer Sherlock is standing at (0,0) poin... 阅读全文
posted @ 2018-12-05 18:49 _年少有为 阅读(202) 评论(0) 推荐(0)
F - Co-prime(数学，容斥原理)
摘要： F - Co-primeGiven a number N, you are asked to count the number of integers between A and B inclusive which are relatively prime ... 阅读全文
posted @ 2018-12-05 18:12 _年少有为 阅读(340) 评论(0) 推荐(0)