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  1. #include <iostream>
  2. #include <iomanip>
  3. #include <math.h>
  4. using namespace std;
  5. double bin_s(double a){
  6. 	double l=0, r=1000 , eps=1e-7;
  7. 	while(abs(l-r)>eps){
  8. 		double m=(l+r)/2;
  9. 		double x=pow(m,m)+sqrt(x);
  10. 		if(a>x)l=m;
  11. 		else r=m;
  12. 	}
  13. 	return l;
  14. }
  15. int main() {
  16. 	double a;
  17. 	cin>>a;
  18. 	cout<<fixed<<setprecision(8)<<bin_s(a);
  19.  
  20.     return 0;
  21. }
  22.  
Success #stdin #stdout 0.01s 5280KB
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stdin
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2.0000000000
stdout
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0.00000000
https://ideone.com/4I8uaL
language:
C++14 (gcc 8.3)
created:
6 days ago
visibility:
public

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