Codeforces 739B Alyona and a tree （树上差分+二分） D. Alyona and a treetime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputAlyona has a tree with n vertices. The CF 2023-12-24 182 点赞 2 评论 275 浏览
