Submission #513745

#	Time	Username	Problem	Language	Result	Execution time	Memory
513745		Aktan	Biochips (IZhO12_biochips)	C++14	0 / 100	252 ms	524292 KiB

biochips

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
#define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update>
#define int long long
#define ft first
#define sc second
using namespace std;
const int mod=1e9+7,INF=1e9+7;

vector<int> v[200005];
int a[200005],b[200005],d[200005];
int tout[200005],dp[200005][505],tin=1;
void dfs(int x){
	int y=tin;
	for(auto w : v[x]){
		dfs(w);
	}
	d[tin]=b[x];
	tout[tin++]=y;
}
main(){
	int n,m;
	cin >> n >> m;
	for(int i=1;i<=n;++i){
		cin >> a[i] >> b[i];
		v[a[i]].push_back(i);
	}
	dfs(0);
	for(int i=0;i<=n;++i){
		for(int j=1;j<=m;++j){
			dp[i][j]=-INF;
		}
	}
	
	for(int i=1;i<=n;i++){
		for(int j=1;j<=m;j++){
			dp[i][j]=max(dp[i-1][j],dp[tout[i]-1][j-1]+d[i]);
		}
	}
	cout << dp[n][m];
}

Compilation message (stderr)

biochips.cpp:23:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   23 | main(){
      | ^~~~

• Subtask 1: 0 / 100