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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	// your code goes here
  6. 	int n,m,k=0,p,k1=0,l;
  7. 	cin>>n>>m;
  8. 	for(int i=n;i<=m;i++)
  9. 	{
  10. 		p=0,l=0;
  11. 		for (int j=1;j<=i;j++)
  12. 		{
  13. 			if(i>n && i<m)
  14. 			{
  15. 			if(i%j==0)
  16. 			p++;
  17. 			}
  18. 			else if(i==n || i==m)
  19. 			{
  20. 				if(i%j==0)
  21. 				l++;
  22. 			}
  23.  
  24. 		}
  25. 		if(p==2)
  26. 		k++;
  27. 		if(l==2)
  28. 		k1++;
  29. 	}
  30.  
  31. 	if(k1==2 && k==0)
  32. 	cout<<"YES";
  33. 	else
  34. 	cout<<"NO";
  35. }
Success #stdin #stdout 0s 4416KB
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stdin
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2 4
stdout
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NO
https://ideone.com/BNvBJT
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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