Submission #1242487

#	Time	Username	Problem	Language	Result	Execution time	Memory
1242487		altern23	Bosses (BOI16_bosses)	C++20	0 / 100	0 ms	324 KiB

bosses

#include <bits/stdc++.h>
using namespace std;
 
#define ll long long
#define pii pair<ll, ll>
#define fi first
#define sec second
#define ld long double

const int MAXN = 5e3;
const ll INF = 1e18;
const int MOD = 998244353;
const ld eps = 1e-6;	

vector<ll> boss[MAXN + 5];
ll dist[MAXN + 5];
int main(){
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);		
	int tc = 1;	
	// cin >> tc;
	for(;tc--;){
		ll N; cin >> N;
		for(int i = 1; i <= N; i++){
			ll K; cin >> K;
			for(int j = 1; j <= K; j++){
				ll x; cin >> x;
				boss[x].push_back(i);
			}
		}
		
		ll ans = INF;
		for(int i = 1; i <= N; i++){
			for(int j = 1; j <= N; j++){
				dist[j] = INF;
			}
			queue<ll> q;
			dist[i] = 0;
			q.push(i);
			for(;!q.empty();){
				auto x = q.front(); q.pop();
				for(auto nxt : boss[x]){
					if(dist[nxt] == INF){
						dist[nxt] = dist[x] + 1;
						q.push(nxt);
					}
				}
			}
			ll MX = -INF;
			for(int j = 1; j <= N; j++){
				MX = max(MX, dist[j]);
			}
			if(MX == INF) continue;
			ll cur = N;
			for(int j = 1; j <= N; j++){
				cur += (MX - dist[j]);
			}
			ans = min(ans, cur);
		}
		
		cout << ans << "\n";
	}
}

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