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  1. #include <iostream>
  2. #include <math.h>
  3.  
  4. int main() {
  5. 	double  i, f = 1, p = 1;
  6. 	int n;
  7. 	scanf("%d",&n);
  8. 	for(int i = 1; i <= n; i++)
  9. 	{ 
  10. 		f = f * i;
  11. 		p *= ( 1 / f + 2);
  12. 	}
  13.     printf("%f ", p);
  14. 	return 0;
  15. }
Success #stdin #stdout 0s 3344KB
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133.353827
https://ideone.com/DEEFJd
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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