| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 1207031 | em4ma2 | Biochips (IZhO12_biochips) | C++20 | 0 ms | 0 KiB |
// 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 ll inf=1e9;
const int mxsz=2e5+4;
const int off=1<<20;
const int siz=504;
vector<ll>adj[mxsz];
int vis[mxsz];
ll a[mxsz];
ll dp[mxsz][siz];
ll 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;
}