#include <bits/stdc++.h>
using namespace std ;
const int MAXN = 2e5 + 5 , MAXM = 505 ;
int arr[MAXN] , sz[MAXN] , dp[MAXN][MAXM] , tmpdp[MAXM] ;
int n , m ;
vector< vector<int> >adj(MAXN) ;
void dfs(int node)
{
dp[node][0] = 0 ;
sz[node] = 1 ;
for(auto &child : adj[node])
{
dfs(child) ;
int Max = 0 ;
for(int k1 = 0 ; k1 <= min(sz[node] , m) ; ++k1)
{
if(!dp[k1])
break ;
for(int k2 = 1 ; k2 <= sz[child] && k1 + k2 <= m ; ++k2)
{
if(!dp[k2])
break ;
Max = max(Max , k1+k2) ;
tmpdp[k1+k2] = max(dp[node][k1+k2] , dp[node][k1] + dp[child][k2]) ;
}
}
for(int i = 1 ; i <= Max ; ++i)
dp[node][i] = max(dp[node][i] , tmpdp[i]) ;
sz[node] += sz[child] ;
}
dp[node][1] = max(dp[node][1] , arr[node]) ;
}
int main()
{
ios_base::sync_with_stdio(0) ;
cin.tie(0) ;
cin>>n>>m ;
int root ;
for(int i = 1 ; i <= n ; ++i)
{
int par ;
cin>>par>>arr[i] ;
if(par == 0)
root = i ;
adj[par].push_back(i) ;
}
dfs(root) ;
return cout<<dp[root][m]<<"\n" , 0 ;
}
Compilation message
biochips.cpp: In function 'int main()':
biochips.cpp:54:28: warning: 'root' may be used uninitialized in this function [-Wmaybe-uninitialized]
return cout<<dp[root][m]<<"\n" , 0 ;
^~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
7 ms |
5120 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
