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  1. #include <iostream>
  2. #include <vector>
  3. #include <set>
  4. using namespace std;
  5.  
  6. int main() {
  7.  
  8. 	int a, b, how_many, i,j;
  9. 	bool divided;
  10.  
  11. 	cin >> a >> b;
  12. 	if(a>b){
  13. 		i=a; a=b; b=i;
  14. 	}
  15. 	how_many = 0;
  16. 	for (int i = a+1; i < b; i++) {
  17.  
  18. 			divided = false;
  19. 			for (j=a; j<=(i/2);j++) {
  20. 				if (i % j == 0) {
  21. 					divided = true;
  22. 					break;
  23. 				}
  24. 			}
  25. 			if(!divided) how_many++;
  26. 	}
  27. 	cout << how_many << '\n';
  28. 	return 0;
  29. }
Success #stdin #stdout 0s 4396KB
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https://ideone.com/dOdv1A
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
secret

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