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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. double calculatePower(double base, int exponent){
  5. 	double res=1.0;
  6. 	while(exponent > 0){
  7. 		if(exponent%2==1){
  8. 			res=res*base;
  9. 		}
  10. 		base=base*base;
  11. 		exponent=exponent/2.0;
  12. 	}
  13. 	return res;
  14. }
  15. int main() {
  16. 	double m;
  17. 	int n;
  18. 	cin>>n>>m;
  19. 	double low=0.0, high=m;
  20. 	double eps=1e-6;
  21.  
  22. 	while(high-low>eps){
  23. 		double mid=(low+high)/2.0;
  24. 		if(calculatePower(mid, n)<m)
  25. 			low=mid;
  26. 		else
  27. 			high=mid;
  28. 	}
  29. 	cout<<low;
  30. 	return 0;
  31. }
Success #stdin #stdout 0.01s 5324KB
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https://ideone.com/NO3DVJ
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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