Submission #1207033

#	Time	Username	Problem	Language	Result	Execution time	Memory
1207033		em4ma2	Biochips (IZhO12_biochips)	C++20	100 / 100	517 ms	401172 KiB

biochips

//                                 اللهم صل على محمد وعلى ال محمد كما صليت على ابراهيم وعلى ال ابراهيم انك حميد مجيد
#include "bits/stdc++.h"

using namespace std;

#define ll long long
//#define int long long
#define pb push_back
#define applejuice ios::sync_with_stdio(false);cin.tie(nullptr);cout.tie(nullptr);

const int mod=1e9+7;
const int inf=1e9;
const int mxsz=2e5+4;
const int off=1<<20;
const int siz=504;

vector<int>adj[mxsz];
int vis[mxsz];
int a[mxsz];
int dp[mxsz][siz];
int sz[mxsz];

void dfs(int i){
    vis[i]=1;
    for (auto x:adj[i]){
        if (!vis[x]){
            dfs(x);
            sz[i]+=sz[x];
        }
    }
}

void tra(int i,int m){
    vis[i]=1;
    for (auto x:adj[i]) {
        if (!vis[x])tra(x,m);
        //cout<<"sdj;";
        for (int j = m; j >=0; j--) {
            for (int l = min(sz[x],j); l >=0; l--) {
                dp[i][j]=max(dp[i][j],dp[x][l]+dp[i][j-l]);
            }
        }
    }
    dp[i][1]=max(dp[i][1],a[i]);
}

signed main(){
    applejuice;

    int n,m;
    cin>>n>>m;
    int root;
    for (int i=1;i<=n;i++){
        int p, x;
        cin>>p>>x;
        a[i]=x;
        if (p==0)root=i;
        adj[p].pb(i);
    }
    for (int i=0;i<=n;i++){
        for (int j=0;j<=m;j++){
            dp[i][j]=-inf;
        }
    }
    for (int i=0;i<=n;i++){
        dp[i][0]=0;
    }
    /*for (int i=1;i<=n;i++){
        if (adj[i].size()==0){
            dp[i][1]=a[i];
        }
    }*/
    for (int i=1;i<=n;i++){
        sz[i]=1;
    }
    dfs(root);
    for (int i=0;i<=n;i++)vis[i]=0;
    tra(root,m);
    /*for (int i=1;i<n;i++){
        for (int j=1;j<=m;j++){
            cout<<dp[i][j]<<" ";
        }
    }*/
    cout<<dp[root][m]<<endl;
}

• Subtask 1: 100 / 100