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  1. // Binary Search » Step 2 » E.Equation
  2. // solution by "for"
  3. #include<bits/stdc++.h>
  4. #define int long long
  5. using namespace std;
  6. signed main(){
  7. 	ios::sync_with_stdio(false); cin.tie(nullptr);
  8. 	double n; cin>>n;
  9. 	double l=0,r=n,mid;
  10. 	for(int i=0;i<80;i++){
  11. 		mid=(l+r)/2.0;
  12. 		if(mid*mid+sqrt(mid)>n) r=mid;
  13. 		else l=mid;
  14. 	}
  15. 	cout<<fixed<<setprecision(12)<<l;
  16. }
  17.  
Success #stdin #stdout 0.01s 5240KB
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stdin
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Standard input is empty
stdout
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0.000000000000
https://ideone.com/xoTmyr
language:
C++ (gcc 8.3)
created:
5 days ago
visibility:
public

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