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2591. [Usaco 2012 Feb]Nearby Cows

https://hydro.ac/d/bzoj/record/6322eb9032ae6c3198cc9ae8
This commit is contained in:
Baoshuo Ren 2022-09-15 17:08:48 +08:00
parent 0c692c1357
commit 244f91eef3
Signed by: baoshuo
GPG Key ID: 00CB9680AB29F51A
21 changed files with 139 additions and 0 deletions

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#include <iostream>
#include <array>
#include <vector>
using std::cin;
using std::cout;
const char endl = '\n';
const int N = 100005;
int n, k, fa[N];
std::vector<int> g[N];
std::array<int[25], N> f1, f2;
void dfs1(int u) {
for (int v : g[u]) {
if (v == fa[u]) continue;
fa[v] = u;
dfs1(v);
for (int i = 1; i <= k; i++) {
f1[u][i] += f1[v][i - 1];
}
}
}
void dfs2(int u) {
for (int v : g[u]) {
if (v != fa[u]) dfs2(v);
}
for (int i = 1; i <= k; i++) {
int cnt = 0, t = u;
while (++cnt < i && fa[t]) {
f1[u][i] += (f2[fa[t]][i - cnt] - f2[t][i - cnt - 1]);
t = fa[t];
}
if (fa[t]) f1[u][i] += f2[fa[t]][0];
}
}
int main() {
std::ios::sync_with_stdio(false);
cin.tie(nullptr);
cin >> n >> k;
for (int i = 1, u, v; i < n; i++) {
cin >> u >> v;
g[u].push_back(v);
g[v].push_back(u);
}
for (int i = 1, x; i <= n; i++) {
cin >> x;
f1[i][0] = x;
}
dfs1(1);
f2 = f1;
dfs2(1);
for (int i = 1; i <= n; i++) {
int sum = 0;
for (int j = 0; j <= k; j++) {
sum += f1[i][j];
}
cout << sum << endl;
}
return 0;
}

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