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  1. /*
  2. 	Solution By - Amrutansu Garanaik
  3. 	Codechef ID - dragonemperor
  4. */
  5.  
  6.  
  7. #include<stdio.h>
  8. int main()
  9. {
  10. 	int test,n,m,ans,a,b;
  11. 	scanf("%d",&test);
  12. 	while(test--)
  13. 	{
  14. 		scanf("%d%d",&n,&m);
  15. 		int arr[n];
  16. 		for(int i=0;i<n;i++)
  17. 			arr[i]=0;		//total citiess
  18. 		for(int i=0;i<m;i++)
  19. 		{
  20. 			scanf("%d%d",&a,&b);	//roads connecting the cities
  21. 			arr[a-1]++;		//as array uses 0-based indexing
  22. 			arr[b-1]++;
  23. 		}
  24. 		ans=1;
  25. 		for(int i=0;i<n;i++)
  26. 			if(arr[i]%2!=0)
  27. 			{
  28. 				ans=0;
  29. 				break;
  30. 			}
  31. 		if(ans==1)
  32. 			printf("YES\n");
  33. 		else
  34. 			printf("NO\n");
  35. 	}
  36. }
Runtime error #stdin #stdout 0s 2728KB
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Standard input is empty
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Standard output is empty
https://ideone.com/RJ5uJX
language:
C++ 4.3.2 (gcc-4.3.2)
created:
9 years ago
visibility:
public

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