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  1. #include<iostream>
  2. #include<vector>
  3. #define MAX 100000
  4. using namespace std;
  5.  
  6. void pre()
  7. {
  8. bool v[MAX];	
  9. 	for(int i=2;i<MAX;i++)v[i]=true;
  10. 	for(int i=2;i<MAX;i++)
  11. 	{
  12. 		if(v[i])
  13. 		for(int j=i;j*i<MAX;j++)
  14. 		v[j*i]=false;
  15. 	}
  16. }
  17. int main()
  18. {
  19. 	pre();
  20. 	int i;
  21.     cin>>i;
  22.     cout<<i;
  23. 	return 0;
  24. }
Success #stdin #stdout 0s 3300KB
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https://ideone.com/286OTE
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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