2018年4月16日
Codeforces Round #447 (Div. 2)E. Ralph and Mushrooms
摘要： Ralph is going to collect mushrooms in the Mushroom Forest. There are m directed paths connecting n trees in the Mushroom Forest. On each path grow so 阅读全文
posted @ 2018-04-16 09:04 HazelNuto 阅读(254) 评论(0) 推荐(0)