oj.uz

Submission #702504

# Submission time Handle Problem Language Result Execution time Memory
702504 2023-02-24T08:19:48 Z Darren0724 Biochips (IZhO12_biochips) C++17
80 / 100
 2000 ms 401872 KB 
//#pragma GCC optimize("Ofast","O3")
//#pragma GCC target("avx2")
#include<bits/stdc++.h>
using namespace std;
const int N=200000;
int n,k;
vector<int> v(N);
vector<vector<int>> adj(N);
vector<vector<int>> dp(501,(vector<int>(N)));
vector<int> leaf(N);
void dfs(int k){
    if(adj[k].size()==0){
        leaf[k]=1;
    }
    for(int u:adj[k]){
        dfs(u);
        leaf[k]+=leaf[u];
        for(int i=min(leaf[k],500);i>0;i--){
            for(int j=1;j<=min(leaf[u],i);j++){
                dp[i][k]=max(dp[i][k],dp[j][u]+dp[i-j][k]);
            }
        }
    }
    dp[1][k]=max(dp[1][k],v[k]);
    return;
}
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int root=0;
    cin>>n>>k;
    for(int i=0;i<n;i++){
        int p;cin>>p;p--;
        if(p!=-1){
            adj[p].push_back(i);
        }
        else{
            root=i;
        }
        cin>>v[i];
    }
    dfs(root);
    cout<<dp[k][root]<<endl;

    return 0;
}

Subtask #1
80.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 155 ms 400076 KB Output is correct
2 Correct 162 ms 400112 KB Output is correct
3 Correct 156 ms 400076 KB Output is correct
4 Correct 182 ms 400380 KB Output is correct
5 Correct 191 ms 400284 KB Output is correct
6 Correct 180 ms 400352 KB Output is correct
7 Correct 675 ms 401796 KB Output is correct
8 Correct 705 ms 401872 KB Output is correct
9 Execution timed out 2100 ms 401636 KB Time limit exceeded
10 Execution timed out 2079 ms 401464 KB Time limit exceeded