Submission #723713

#	Time	Username	Problem	Language	Result	Execution time	Memory
723713		Mardonbekhazratov	Bosses (BOI16_bosses)	C++17	0 / 100	0 ms	212 KiB

bosses

#include<bits/stdc++.h>
#define ll long long
using namespace std;
const int INF=1e9;
vector<vector<int>>v,g;
vector<bool>vis;
vector<int>a;
int n;

void dfs(int x){
	vis[x]=true;
	int s=0;
	for(int z:v[x])
		if(!vis[z])
			g[x].push_back(z);
	for(int z:g[x]){
		if(!vis[z]){
		dfs(z);
		s+=a[z];}
	}
	a[x]+=s;
}


int solve(int x){
	g.resize(n+1);
	vis.assign(n+1,false);
	a.assign(n+1,1);
	dfs(x);
	int s=0;
	for(int i=1;i<=n;i++) s+=a[i];
	return s;
}


int main(){
	freopen("input.txt","r",stdin);
	cin>>n;
	v.resize(n+1);
	for(int i=1;i<=n;i++){
		int k;cin>>k;
		for(int j=0;j<k;j++){
			int x;cin>>x;
			v[x].push_back(i);
		}
	}
	int res=INF;
	for(int i=1;i<=n;i++){
		res=min(res,solve(i));
	}
	cout<<res;
}

Compilation message (stderr)

bosses.cpp: In function 'int main()':
bosses.cpp:37:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |  freopen("input.txt","r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 22
• Subtask 2: 0 / 45
• Subtask 3: 0 / 33