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  1. #include <iostream>
  2. #include <cmath>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	long long  n,k;
  7.     long double length,width;
  8. 	cin>>n;
  9. 	length = floor(sqrt(n));
  10. 	width = ceil(n/length);
  11. 	k = 2*n + length + width;
  12. 	cout<<k<<endl;
  13. 	return 0;
  14. }
Success #stdin #stdout 0s 16064KB
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-9223372036854775808
https://ideone.com/aGLn34
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
secret

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