oj.uz

Submission #783635

# Submission time Handle Problem Language Result Execution time Memory
783635 2023-07-15T06:56:05 Z makanhulia Naboj (COCI22_naboj) C++17
110 / 110
 156 ms 24732 KB 
#include <bits/stdc++.h>
#define int long long
#define fi first
#define se second
#define keish                             ios_base::sync_with_stdio(0);       cin.tie(0); cout.tie(0)
      
using namespace std;

int n, m, u, v;

signed main(){
      keish;
  cin >> n >> m;
      vector<vector<int>> e(n);
      vector<int> deg(n);
      for(int i = 0; i < m; i++){
            cin >> u >> v; u--, v--;
            e[v].push_back(u);
            deg[u]++;
      }

      queue<int> q;
      vector<int> ans;
      for(int i = 0; i < n; i++){
            if(!deg[i]){
                  q.push(i);
                  ans.push_back(i);
            }
      }

      while(!q.empty()){
            int u = q.front(); q.pop();

            for(auto v : e[u]){
                  deg[v]--;
                  if(!deg[v]){
                        q.push(v);
                        ans.push_back(v);
                  }
            }
      }

      for(int i = 0; i < n; i++){
            if(deg[i]){
                  cout << -1 << '\n';
                  return 0;
            }
      }

      cout << ans.size() << '\n';
      for(auto x : ans) cout << x + 1 << " " << 1 << '\n';
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 324 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 316 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 82 ms 17292 KB Output is correct
2 Correct 75 ms 17364 KB Output is correct
3 Correct 41 ms 9152 KB Output is correct
4 Correct 80 ms 17336 KB Output is correct
5 Correct 82 ms 17340 KB Output is correct
6 Correct 83 ms 17376 KB Output is correct
7 Correct 82 ms 17340 KB Output is correct
8 Correct 60 ms 13572 KB Output is correct
9 Correct 83 ms 17268 KB Output is correct
10 Correct 81 ms 17316 KB Output is correct

Subtask #3
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 324 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 316 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 82 ms 17292 KB Output is correct
16 Correct 75 ms 17364 KB Output is correct
17 Correct 41 ms 9152 KB Output is correct
18 Correct 80 ms 17336 KB Output is correct
19 Correct 82 ms 17340 KB Output is correct
20 Correct 83 ms 17376 KB Output is correct
21 Correct 82 ms 17340 KB Output is correct
22 Correct 60 ms 13572 KB Output is correct
23 Correct 83 ms 17268 KB Output is correct
24 Correct 81 ms 17316 KB Output is correct
25 Correct 86 ms 16008 KB Output is correct
26 Correct 74 ms 17324 KB Output is correct
27 Correct 87 ms 18504 KB Output is correct
28 Correct 112 ms 20964 KB Output is correct
29 Correct 67 ms 17244 KB Output is correct
30 Correct 147 ms 20720 KB Output is correct
31 Correct 16 ms 3028 KB Output is correct
32 Correct 84 ms 19756 KB Output is correct
33 Correct 143 ms 23840 KB Output is correct
34 Correct 98 ms 19892 KB Output is correct
35 Correct 152 ms 23920 KB Output is correct
36 Correct 83 ms 19568 KB Output is correct
37 Correct 131 ms 22700 KB Output is correct
38 Correct 116 ms 21432 KB Output is correct
39 Correct 140 ms 23716 KB Output is correct
40 Correct 140 ms 22132 KB Output is correct
41 Correct 139 ms 22076 KB Output is correct
42 Correct 155 ms 24536 KB Output is correct
43 Correct 104 ms 20328 KB Output is correct
44 Correct 156 ms 24732 KB Output is correct
45 Correct 97 ms 19896 KB Output is correct
46 Correct 147 ms 22292 KB Output is correct