Submission #360163

#	Time	Username	Problem	Language	Result	Execution time	Memory
360163		Pety	Bosses (BOI16_bosses)	C++14	100 / 100	695 ms	768 KiB

bosses

#include <bits/stdc++.h>

using namespace std;

int n, ans, dist[5002], k, x;
vector<int>G[5002];

int main()
{
  ios_base::sync_with_stdio(false);
  cin.tie(0); cout.tie(0);
  cin >> n;
  for (int i = 1; i <= n; i++) {
    cin >> k;
    while (k--) {
      cin >> x;
      G[x].push_back(i);
    }
  }
  ans = 1e9;
  for (int i = 1; i <= n; i++) {
    memset(dist, -1, sizeof(dist));
    dist[i] = 1;
    queue<int>q;
    q.push(i);
    int cost = 0, count = 0;
    while (!q.empty()) {
      int x = q.front();
      q.pop();
      cost += dist[x];
      count++;
      for (auto it : G[x])
        if (dist[it] == -1) {
          dist[it] = dist[x] + 1;
          q.push(it);
        }
    }
    if (count == n)
      ans = min(ans, cost);
  }
  cout << ans;
  return 0;
}

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