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  1. #include<iostream>
  2. #include<vector>
  3. using namespace std;
  4. int main(){
  5. int n,e;
  6. cin>>n>>e;
  7. vector<int>ob[n+1];
  8. int u,v;
  9. for(int i=1;i<=e;i++){
  10.   cin>>u>>v;
  11. ob[u].push_back(v);
  12. }
  13.  
  14.  
  15. for(int j=1;j<=n;j++){
  16. cout<<j<<":";
  17. for (int i:ob[j]){
  18.     cout<<i<<" ";
  19.  
  20. }cout<<endl;
  21. }}
Success #stdin #stdout 0.01s 5288KB
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1:
2:
https://ideone.com/Rk5ZwV
language:
C++ (gcc 8.3)
created:
7 days ago
visibility:
public

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