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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	// your code goes here
  6. 	int n,m;
  7. 	cin>>n>>m;
  8. 	map<int,list<int>>v1;
  9. 	for(int i=0;i<m;i++){
  10. 		int u,v;
  11. 		cin>>u>>v;
  12. 		v1[u].push_back(v);
  13. 		v1[v].push_back(u);
  14. 	}
  15. 	for(auto i:v1){
  16. 		cout<<i.first<<"-";
  17. 		for(auto x:i.second){
  18. 			cout<<x<<" ";
  19. 		}
  20. 		cout<<"\n";
  21. 	}
  22. 	return 0;
  23. }
Success #stdin #stdout 0.01s 5456KB
comments (?)
stdin
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5 7
0 1
0 4
1 2
1 3
1 4
2 3
3 4
stdout
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0-1 4 
1-0 2 3 4 
2-1 3 
3-1 2 4 
4-0 1 3
https://ideone.com/0qlRxN
language:
C++14 (gcc 8.3)
created:
1 year ago
visibility:
public

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