【题解】Luogu p3047 [USACO12FEB]附近的牛Nearby Cows 树型dp
Farmer John has noticed that his cows often move between nearby fields. Taking this into account, he wants to plant enough grass in each of his fields ......DP百题练（二）
目录 DP百题练（二） 区间 DP NOI1995 石子合并 IOI1998 Polygon CH5302 金字塔 USACO06FEB Treats for the Cows G/S LG1043 数字游戏 LG1063 能量项链 LG1005 矩 ......[USACO12FEB]Symmetry
传送门： https://www.luogu.com.cn/problem/P3046 https://ac.nowcoder.com/acm/contest/6306/G 题意 给定n个不同的点，求这个点集有多少条对称轴 题解 对于一个 ......P3047 [USACO12FEB]Nearby Cows G 题解
P3047 [USACO12FEB]Nearby Cows G 题目描述 思路 使用换根DP， 设 \(dp[i][j]\) 表示以 \(i\) 为根节点的子树中深度小于等于 \(j\) 的点的权值之和。 设 \(f[i][j ......![]()
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