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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5.  
  6. 	int n, m;
  7. 	cin >> n >> m;
  8.  
  9. 	vector<int> graph[n];
  10.  
  11. 	for(int i=0; i<m; i++) {
  12. 		// taking input of undirected graph.
  13.  
  14. 		int x, y;
  15. 		cin >> x >> y;
  16.  
  17. 		graph[x].push_back(y);
  18. 		graph[y].push_back(x);
  19. 	}
  20.  
  21. 	for(int i=0; i<n; i++) {
  22. 		int c = graph[i].size();
  23.  
  24. 		cout << i << " " << c << endl;
  25. 	}
  26. 	return 0;
  27. }
Success #stdin #stdout 0s 5316KB
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stdin
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5 4
0 1
1 2
2 3
2 4
stdout
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0 1
1 2
2 3
3 1
4 1
https://ideone.com/I3dN1V
language:
C++ (gcc 8.3)
created:
18 hours ago
visibility:
public

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