2019年2月21日
codeforces #530 D(Sum in the tree) (树上贪心)
摘要： Mitya has a rooted tree with nn vertices indexed from 11 to nn, where the root has index 11. Each vertex vv initially had an integer number av≥0av≥0 w 阅读全文
posted @ 2019-02-21 17:38 WAKBGAN 阅读(308) 评论(0) 推荐(0) 编辑