Submission #1176195

#	Time	Username	Problem	Language	Result	Execution time	Memory
1176195		vjudge2	Magic Tree (CEOI19_magictree)	C++20	34 / 100	2098 ms	32524 KiB

magictree

#include <bits/stdc++.h>
using namespace std;

#define int long long

const int N = 1e5 + 5;
int n, m, k, p[N], dp[N][21];
vector<int> adj[N];
pair<int, int> hang[N];

void dfs(int u) {
    for (int v : adj[u]) {
        dfs(v);
        for (int i = 0; i <= k; i++) dp[u][i] += dp[v][i];
    }
    dp[u][hang[u].first] += hang[u].second;
    for (int i = 1; i <= k; i++) dp[u][i] = max(dp[u][i], dp[u][i-1]);
}

int32_t main() {
    ios::sync_with_stdio(0); cin.tie(0);
    cin >> n >> m >> k;
    for (int i = 2; i <= n; i++) {
        cin >> p[i];
        adj[p[i]].push_back(i);
    }
    for (int i = 1; i <= m; i++) {
        int v, d, w;
        cin >> v >> d >> w;
        hang[v] = {d, w};
    }
    dfs(1);
    cout << dp[1][k] << '\n';
}

• Subtask 1: 6 / 6
• Subtask 2: 0 / 3
• Subtask 3: 0 / 11
• Subtask 4: 12 / 12
• Subtask 5: 16 / 16
• Subtask 6: 0 / 13
• Subtask 7: 0 / 22
• Subtask 8: 0 / 17