fork download
copy 
  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	double S(long);
  6. 	long inp;
  7. 	cin>>inp;
  8. 	cout<<S(inp);
  9. 	return 0;
  10. }
  11. double S(long n)
  12. 	{
  13. 		if(n==1)
  14. 			return 1;
  15. 		long key=n%4;
  16. 		switch(key)
  17. 			{
  18. 				case 0:
  19. 					return n*(n-1)*(-1)+S(n-2);
  20. 				case 1:
  21. 					return (double(n-1)/n)*(n-2)*(-1)+S(n-3);
  22. 				case 2:
  23. 					return n+S(n-1);
  24. 				case 3:
  25. 					return n*(-1)+S(n-1);
  26. 			}
  27. 	}
Success #stdin #stdout 0s 4072KB
comments (?)
stdin
copy 
31417
stdout
copy 
-3.59816
https://ideone.com/qkW90j
https://b...content-available-to-author-only...t.org/problems/fuzzy-operators/
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!