제출 #171166

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
171166		WLZ	Bosses (BOI16_bosses)	C++14	100 / 100	1057 ms	924 KiB

bosses

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

const long long INF = (long long) 1e18;

int n;
vector< vector<int> > g;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cin >> n;
  g.resize(n + 1);
  for (int i = 1; i <= n; i++) {
    int k;
    cin >> k;
    while (k--) {
      int p;
      cin >> p;
      g[p].push_back(i);
    }
  }
  long long ans = INF;
  for (int i = 1; i <= n; i++) {
    vector<int> dist(n + 1, -1);
    dist[i] = 1;
    queue<int> q;
    q.push(i);
    while (!q.empty()) {
      int u = q.front();
      q.pop();
      for (auto& v : g[u]) {
        if (dist[v] == -1) {
          dist[v] = dist[u] + 1;
          q.push(v);
        }
      }
    }
    int pos = 1;
    long long tmp = 0;
    for (int j = 1; j <= n; j++) {
      if (dist[j] == -1) {
        pos = 0;
        break;
      }
      tmp += (long long) dist[j];
    }
    if (pos) {
      ans = min(ans, tmp);
    }
  }
  cout << ans << '\n';
  return 0; 
}

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