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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int v, e;
  6. 	int degree[3001];
  7.  
  8. 	cin >> v >> e;
  9. 	for(int i = 0; i < e; i++){
  10. 		int a, b;
  11. 		cin >> a >> b;
  12. 		degree[a]++;
  13. 		degree[b]++;
  14. 	}
  15.  
  16. 	int cnt = 0;
  17. 	for(int i = 1; i < v; i++){
  18. 		if(degree[i] % 2 != 0){
  19. 			cnt++;
  20. 		}
  21. 	}
  22. 	if(cnt == 0 || cnt == 2) cout << "YES" << endl;
  23. 	else cout << "NO" << endl;
  24. 	return 0;
  25. }
Success #stdin #stdout 0.01s 5408KB
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stdin
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4 5
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stdout
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YES
https://ideone.com/rRAK3E
language:
C++ (gcc 8.3)
created:
1 year ago
visibility:
public

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