Submission #502807

#	Time	Username	Problem	Language	Result	Execution time	Memory
502807		tmn2005	Biochips (IZhO12_biochips)	C++17	0 / 100	285 ms	524292 KiB

biochips

#include<bits/stdc++.h>
using namespace std;

typedef long long ll;

#define ar array
#define fr first
#define sc second

#define vec vector
#define ret return

#define ins insert
#define mk make_pair
#define pb push_back
#define pf push_front
#define pob pop_back
#define pof pop_front

#define int long long

#define pii pair<int,int>

#define all(s) s.begin(), s.end()
#define allr(s) s.rbegin(), s.rend()

#define NeedForSpeed ios::sync_with_stdio(0),cin.tie(0);
#define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update>
const int N = 1e6+12,INF=1e9+7;
vector <int> g[N];
int tout[N],o=1,n,k,b[N],a[N],dp[200001][501];

void dfs(int v){
    int t = o;
    for(int to : g[v]){
        dfs(to);
    }
    a[o] = b[v];
    tout[o++] = t;
} 
main(){
    cin>>n>>k;
    for (int i=1;i<=n;++i){
        int a;
        cin>>a>>b[i];
        g[a].pb(i);
    }
    dfs(0);
	for(int i=0; i<=n; i++){
		for(int j=1; j<=k; j++){
			dp[i][j] = -INF;
		}
	}
	for(int i=1; i<=n; i++){
		for(int j=1; j<=k; j++){
			dp[i][j] = max(dp[i-1][j], dp[tout[i]-1][j-1] + a[i]);
		}
	}
	cout<<dp[n][k];
}

Compilation message (stderr)

biochips.cpp:41:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   41 | main(){
      | ^~~~

• Subtask 1: 0 / 100