P2986

P2986 Great Cow Gathering G

换根dp, father -> son , 基本是加减 #include <bits/stdc++.h> using namespace std ; const int N=1e5+2,M=N*5; #define int long long int n,a[N],sz[N],g[N],f[N],S ......
Gathering P2986 Great 2986 Cow

洛谷 P2986 [USACO10MAR] Great Cow Gathering G(树形DP/换根DP)

https://www.luogu.com.cn/problem/P2986 输入 #1 5 1 1 0 0 2 1 3 1 2 3 2 3 4 3 4 5 3 输出 #1 15 推荐这位佬的思路以及题解 https://zhuanlan.zhihu.com/p/571948153 #include ......
树形 Gathering P2986 Great USACO
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