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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5.  
  6. #define boost ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
  7.  
  8. typedef long long ll;
  9.  
  10. set<ll> s[100001];
  11. ll visited[1000001];
  12. ll indegree[100001];
  13.  
  14.  
  15. int main(){
  16.     boost;
  17.     ll T,N,i,j,k;
  18.     ll M;
  19.     cin >> T;
  20.     while(T--){
  21.    // v.clear();
  22.     cin >> N >> M;
  23.     memset(visited,0,sizeof(visited));
  24.     for(i = 0 ; i < N ; i++){
  25.         s[i].clear();
  26.         for(j = i+1 ; j < N ; j++){
  27.             s[i].insert(j);
  28.             indegree[j]++;
  29.         }
  30.     }
  31.  
  32.     for(i = 0 ; i < M ; i++){
  33.         ll u,v;
  34.         cin >> u >> v;
  35.         u--;
  36.         v--;
  37.         s[min(u,v)].erase(s[min(u,v)].find(max(u,v)));
  38.         indegree[max(u,v)]--;
  39.     }
  40.     ll status = 0;
  41.     while(!status){
  42.         status = 1;
  43.         for(i = N-1 ; i >= 0 ; i--){
  44.             if(!visited[i] && indegree[i] == 0){
  45.                 status = 0;
  46.                 visited[i] = 1;
  47.                 cout << i+1 << " ";
  48.                 set<ll>::iterator it;
  49.                 for(it = s[i].begin() ; it != s[i].end() ; it++)
  50.                     indegree[*it]--;
  51.                 break;
  52.             }
  53.         }
  54.     }
  55.     cout << endl;
  56. }
  57. }
  58.  
Success #stdin #stdout 0s 14408KB
comments (?)
stdin
copy 
3
3 2
1 3
2 3
4 0
4 2
1 2
1 3
stdout
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3 1 2 
1 2 3 4 
2 3 1 4
https://ideone.com/Hz2kFZ
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
secret

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