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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main(){
  5.  
  6. 	int a,b;
  7. 	cin >> a >> b;
  8.  
  9. 	bool num[b+1];
  10. 	num[1]=true;
  11. 	num[0]=true;
  12.  
  13. 	for(int i=2; i*i<=b; i++){
  14. 		if(!num[i])
  15. 			for(int j=i*i; j<=b; j+=i)
  16. 				num[j]=true;
  17. 	}
  18.  
  19. 	for(int i=a; i<=b; i++)
  20. 		if(num[i]==false)
  21. 			cout << i <<endl;
  22. }
  23.  
Success #stdin #stdout 0s 15232KB
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Standard output is empty
https://ideone.com/5aUvOv
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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