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  1. #include <cstdio>
  2. #include <cmath>
  3.  
  4. using namespace std;
  5.  
  6. int main()
  7. {
  8. 	long long n;
  9. 	scanf("%lld", &n);
  10. 	long long ans = 1;
  11. 	// long long m = sqrt(n);
  12. 	for (long long i = 1; i * i <= n; i++)
  13. 	{
  14. 		if (n % (i * i) == 0)
  15. 		{
  16. 			ans = i * i;
  17. 		}
  18. 	}
  19. 	printf("%lld", ans);
  20. }
Success #stdin #stdout 0s 16048KB
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https://ideone.com/Q9WVOw
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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