Submission #1224033

#	Time	Username	Problem	Language	Result	Execution time	Memory
1224033		VMaksimoski008	Biochips (IZhO12_biochips)	C++17	90 / 100	565 ms	408612 KiB

biochips

#include <bits/stdc++.h>
using namespace std;
const int N = 2e5 + 5;

int n, m, root, p[N], a[N], dp[N][505], sub[N];
vector<int> g[N];

void dfs(int u, int p) {
    for(int v : g[u]) {
        if(v == p) continue;
        dfs(v, u);
        for(int i=min(m, sub[u]); i>=0; i--)
            for(int j=min(m-i, sub[v]); j>=0; j--)
                dp[u][i+j] = max(dp[u][i+j], dp[u][i] + dp[v][j]);
        sub[u] += sub[v];
    }
    sub[u]++;
    dp[u][1] = max(dp[u][1], a[u]);
}

signed main() {
    cin >> n >> m;
    for(int i=1; i<=n; i++) {
        cin >> p[i] >> a[i];
        if(!p[i]) root = i;
        else {
            g[p[i]].push_back(i);
            g[i].push_back(p[i]);
        }
    }

    dfs(root, root);
    cout << dp[root][m] << '\n';
}

• Subtask 1: 90 / 100