popobobo:
博客地址：https://www.cnblogs.com/popodynasty/
popobobo:
博客地址：https://www.cnblogs.com/popodynasty/
VJ - H - Almost the shortest route - 图论（反向建图）
VJ - dp - Monkey and Banana - 最长单调序列
2020.03.09 Educational Codeforces Round 83 (Rated for Div. 2)
树上DP - 最大连通子树 - CodeForces - Maximum White Subtree