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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. int main()
  4. {
  5. 	int u,w;
  6. 	cin>>u>>w;
  7. 	vector<vector<int>>adj(u);
  8.  
  9. 	for(int i=0;i<w;i++)
  10. 	{
  11. 		int p,v;
  12. 		cin>>p>>v;
  13. 		adj[p].push_back(v);
  14. 		adj[v].push_back(p);
  15.  
  16. 	}
  17. 	for(int i=0;i<u;i++)
  18. 	{
  19. 		cout<<i<<":"<<endl;
  20. 		for(auto l:adj[i])
  21. 		{
  22. 			cout<<l<<endl;
  23.  
  24. 		}
  25. 	}
  26. }
Success #stdin #stdout 0.01s 5320KB
comments (?)
stdin
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4 3
0 1
0 2
1 3
stdout
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0:
1
2
1:
0
3
2:
0
3:
1
https://ideone.com/kmssIl
language:
C++ (gcc 8.3)
created:
2 days ago
visibility:
public

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