제출 #1263633

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1263633		mingga	Bosses (BOI16_bosses)	C++20	100 / 100	392 ms	776 KiB

bosses

#include "bits/stdc++.h"

using namespace std;

#define ln "\n"
#define pb push_back
#define fi first
#define se second
#define all(x) (x).begin(), (x).end()
#define sz(x) ((int)(x).size())
#define int long long
const int mod = 1e9 + 7;
const int inf = 2e18;
const int N = 5005;
vector<int> g[N];
int d[N];
int n;

signed main() {
	cin.tie(0) -> sync_with_stdio(0);
	#define task ""
	if(fopen(task ".INP", "r")) {
		freopen(task ".INP", "r", stdin);
		freopen(task ".OUT", "w", stdout);
	}
	cin >> n;
	for(int i = 1; i <= n; i++) {
		int k; cin >> k;
		while(k--) {
			int x; cin >> x;
			g[x].pb(i);
		}
	}
	int ans = inf;
	for(int i = 1; i <= n; i++) {
		queue<int> q;
		q.push(i);
		memset(d, 0, sizeof d);
		d[i] = 1;
		int cur = 0;
		int cnt = 0;
			// cerr << "TURN " << i << ln;
		while(sz(q)) {
			int u = q.front(); q.pop();
			cur += d[u];
			cnt++;
			for(int v : g[u]) {
				if(d[v] == 0) {
					// cerr << u << ' ' << v << ln;
					d[v] = d[u] + 1;
					q.push(v);
				}
			}
		}
		if(cnt < n) continue;
		ans = min(ans, cur);
	}
	cout << ans << ln;
    cerr << "\nTime: " << clock() * 1000 / CLOCKS_PER_SEC;
}

컴파일 시 표준 에러 (stderr) 메시지

bosses.cpp: In function 'int main()':
bosses.cpp:23:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |                 freopen(task ".INP", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
bosses.cpp:24:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |                 freopen(task ".OUT", "w", stdout);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

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