oj.uz

Submission #782538

# Submission time Handle Problem Language Result Execution time Memory
782538 2023-07-14T04:40:43 Z gun_gan Naboj (COCI22_naboj) C++17
110 / 110
 167 ms 16152 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

const int MX = 2e5 + 5;

int N, M;
int deg[MX];
vector<int> g[MX];

int main() {
      cin.tie(0); ios_base::sync_with_stdio(0);

      cin >> N >> M;
      for(int i = 0; i < M; i++) {
            int u, v;
            cin >> u >> v;
            g[v].push_back(u);
            deg[u]++;
      }

      queue<int> q;
      vector<int> ord;
      for(int i = 1; i <= N; i++) {
            if(!deg[i]) {
                  q.push(i);
            }
      }

      int cnt = 0;
      while(!q.empty()) {
            auto v = q.front(); q.pop();
            cnt++;

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

      if(cnt < N) {
            cout << -1 << '\n';
            return 0;
      }

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

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 3 ms 5012 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 5004 KB Output is correct
10 Correct 2 ms 4948 KB Output is correct
11 Correct 2 ms 4948 KB Output is correct
12 Correct 3 ms 5028 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 5020 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 66 ms 12044 KB Output is correct
2 Correct 79 ms 13552 KB Output is correct
3 Correct 34 ms 9932 KB Output is correct
4 Correct 66 ms 13568 KB Output is correct
5 Correct 66 ms 13596 KB Output is correct
6 Correct 76 ms 13636 KB Output is correct
7 Correct 89 ms 13560 KB Output is correct
8 Correct 51 ms 11972 KB Output is correct
9 Correct 65 ms 13516 KB Output is correct
10 Correct 69 ms 13512 KB Output is correct

Subtask #3
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 3 ms 5012 KB Output is correct
5 Correct 3 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 5004 KB Output is correct
10 Correct 2 ms 4948 KB Output is correct
11 Correct 2 ms 4948 KB Output is correct
12 Correct 3 ms 5028 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 5020 KB Output is correct
15 Correct 66 ms 12044 KB Output is correct
16 Correct 79 ms 13552 KB Output is correct
17 Correct 34 ms 9932 KB Output is correct
18 Correct 66 ms 13568 KB Output is correct
19 Correct 66 ms 13596 KB Output is correct
20 Correct 76 ms 13636 KB Output is correct
21 Correct 89 ms 13560 KB Output is correct
22 Correct 51 ms 11972 KB Output is correct
23 Correct 65 ms 13516 KB Output is correct
24 Correct 69 ms 13512 KB Output is correct
25 Correct 82 ms 11604 KB Output is correct
26 Correct 109 ms 12844 KB Output is correct
27 Correct 104 ms 13084 KB Output is correct
28 Correct 135 ms 13472 KB Output is correct
29 Correct 85 ms 12772 KB Output is correct
30 Correct 126 ms 13404 KB Output is correct
31 Correct 17 ms 6828 KB Output is correct
32 Correct 67 ms 15348 KB Output is correct
33 Correct 147 ms 16004 KB Output is correct
34 Correct 92 ms 15376 KB Output is correct
35 Correct 151 ms 16012 KB Output is correct
36 Correct 75 ms 15428 KB Output is correct
37 Correct 167 ms 15776 KB Output is correct
38 Correct 122 ms 15624 KB Output is correct
39 Correct 155 ms 16152 KB Output is correct
40 Correct 105 ms 15816 KB Output is correct
41 Correct 105 ms 15776 KB Output is correct
42 Correct 137 ms 16052 KB Output is correct
43 Correct 135 ms 15456 KB Output is correct
44 Correct 159 ms 16120 KB Output is correct
45 Correct 100 ms 15408 KB Output is correct
46 Correct 132 ms 15788 KB Output is correct