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  1. #include <iostream>
  2. #include <iomanip>
  3. #include <cmath>
  4. using namespace std;
  5.  
  6. double bb(double n, int i = 0){
  7. 	if (n == 1) return 1;
  8. 	return sqrt(n-i+bb(n-1,i+1));
  9. }
  10.  
  11. int main() {
  12. 	int m,n;
  13. 	cin >> m;
  14. 	for(int i = 0; i < m; i++){
  15. 		cin >> n;
  16. 		cout << fixed << setprecision(10) << bb(n,0) << endl;
  17. 	}
  18.  
  19. 	return 0;
  20. }
Success #stdin #stdout 0s 4476KB
comments (?)
stdin
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3
6
17
30
stdout
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-nan
-nan
-nan
https://ideone.com/Y5kepN
language:
C++ (gcc 8.3)
created:
4 years ago
visibility:
public

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