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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int t,a,b,k,i,j,ctr,arr[1000001];
  6. 	cin>>t;
  7. 	memset(arr, 0, 1000001*sizeof(arr[0]));
  8. 	for(i=2;i<=(1000);i++)
  9. 	{
  10.  
  11. 		{
  12. 			if(arr[i]==0)
  13. 			for(j=2*i;j<=1000000;j+=i)
  14. 			arr[j]++;
  15. 		}
  16. 	}
  17.  
  18. 	while(t--)
  19. 	{
  20. 		ctr=0;
  21. 		cin>>a>>b>>k;
  22. 		for(i=a;i<=b;i++)
  23. 		{  
  24. 			if(k==1)
  25. 			{
  26. 				if(arr[i]==1||arr[i]==0&&i!=1)
  27. 				ctr++;
  28. 			}
  29. 			else 
  30. 			{ 
  31. 				if(arr[i]==k)
  32. 				ctr++;
  33. 			}
  34. 		}
  35. 		cout<<ctr<<endl;
  36. 	}
  37. 	return 0;
  38. }
Success #stdin #stdout 0s 19848KB
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https://ideone.com/ApRsty
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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