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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. int n, m, a, b, ret;
  4. vector<int> adj[10004], v;
  5.  
  6. int go(int here){
  7.     int cnt = 0;
  8.     for(int there : adj[here]){
  9.         cnt += go(there);
  10.         cnt++;
  11.     }
  12.     return cnt;
  13. }
  14. int main(){
  15.     ios_base::sync_with_stdio(false);
  16.     cin.tie(NULL); cout.tie(NULL);
  17.     cin >> n >> m;
  18.     for(int i = 0; i < m; i++){
  19.         cin >> a >> b;
  20.         adj[b].push_back(a);
  21.     }
  22.     for(int i = 0; i < m; i++){
  23.         ret = max(ret, go(i));
  24.     }
  25.     for(int i = 0; i < m; i++){
  26.         if(ret == go(i)) v.push_back(i);
  27.     }
  28.  
  29.     for(int c : v) cout << c << ' ';
  30. }
Success #stdin #stdout 0.01s 5268KB
comments (?)
stdin
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5 4
3 1
3 2
4 3
5 3
stdout
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1 2
https://ideone.com/O8exCr
language:
C++ (gcc 8.3)
created:
2 days ago
visibility:
public

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