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Submission #171166

# Submission time Handle Problem Language Result Execution time Memory
171166 2019-12-27T15:54:23 Z WLZ Bosses (BOI16_bosses) C++14
100 / 100
 1057 ms 924 KB 
#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
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 3 ms 376 KB Output is correct
3 Correct 3 ms 376 KB Output is correct
4 Correct 2 ms 380 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 3 ms 376 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 3 ms 376 KB Output is correct
3 Correct 3 ms 376 KB Output is correct
4 Correct 2 ms 380 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 3 ms 376 KB Output is correct
7 Correct 3 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 1 ms 376 KB Output is correct
10 Correct 3 ms 248 KB Output is correct
11 Correct 3 ms 504 KB Output is correct

Subtask #3
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 3 ms 376 KB Output is correct
3 Correct 3 ms 376 KB Output is correct
4 Correct 2 ms 380 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 3 ms 376 KB Output is correct
7 Correct 3 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 1 ms 376 KB Output is correct
10 Correct 3 ms 248 KB Output is correct
11 Correct 3 ms 504 KB Output is correct
12 Correct 5 ms 380 KB Output is correct
13 Correct 6 ms 504 KB Output is correct
14 Correct 171 ms 636 KB Output is correct
15 Correct 17 ms 760 KB Output is correct
16 Correct 738 ms 760 KB Output is correct
17 Correct 1057 ms 924 KB Output is correct
18 Correct 1012 ms 760 KB Output is correct