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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. int main()
  6. {
  7. 	int n, m, u, v;
  8. 	cin >> n >> m;
  9. 	vector <vector <int> > e(n);
  10.  
  11. 	for (int i = 0; i < m; i++)
  12. 	{
  13. 		cin >> u >> v;
  14. 		e[u-1].push_back(v);
  15. 	}
  16.  
  17. 	cout << n << endl;
  18.  
  19. 	for (int i = 0; i < n; i++)
  20. 	{
  21. 		cout << e[i].size() << " ";
  22. 		sort(e[i].begin(), e[i].end());
  23.  
  24. 		for (int j = 0; j < e[i].size(); j++)
  25. 			cout << e[i][j] << " ";
  26.  
  27. 		cout << endl;
  28. 	}
  29. }
Success #stdin #stdout 0s 4452KB
comments (?)
stdin
copy 
	4 6
1 2
3 1
3 2
3 4
4 2
4 3
stdout
copy 
4
1 2 
0 
3 1 2 4 
2 2 3
https://ideone.com/FZ91NQ
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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