Submission #66409

#	Time	Username	Problem	Language	Result	Execution time	Memory
66409		khohko	Bosses (BOI16_bosses)	C++17	100 / 100	874 ms	48508 KiB

bosses

#include <bits/stdc++.h>
#pragma GCC optimize("O3")
using namespace std;
#define ll long long
#define pb push_back
#define fr first
#define sc second
#define MAX ((ll)(1e9+100))
#define MX ((ll)(1e6+100))
#define ARRS ((ll)(2e6+100))
#define HS ((ll)(233))
#define MOD ((ll)(1e9+7))
#define EP ((double)(1e-9))
#define LG 21
#define mul(a,b) a=((a)*(b))%MOD
using namespace std;

ll n;
ll m,k;
vector<ll> v[ARRS];
ll f[ARRS];
int main(){
	#ifdef KHOKHO
		freopen("in.in","r",stdin);
		freopen("out.out","w",stdout);
	#endif // KHOKHO
	ios::sync_with_stdio(0);
	cin>>n;
	for(int i=1; i<=n; i++){
		cin>>m;
		while(m--){
			cin>>k;
			v[k].pb(i);
		}
	}
	ll pas=MAX;
	for(int i=1; i<=n; i++){
		for(int i=1; i<=n; i++)f[i]=0;
		queue<pair<ll,ll> > q;
		q.push({i,1});
		ll p=0;
		while(q.size()){
			auto x=q.front();
			q.pop();
			if(f[x.fr])continue;
			f[x.fr]=1;
			p+=x.sc;
			for(auto y:v[x.fr])
				q.push({y,x.sc+1});
		}
		bool e=1;
		for(int i=1; i<=n; i++)e&=f[i];
		if(e)
		pas=min(pas,p);
	}
	cout<<pas;
}

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