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  1. #include <iostream>
  2. #include <cmath>
  3.  
  4. using namespace std;
  5.  
  6. int main() {
  7.     double c, eps;
  8.     cin >> c >> eps;
  9.  
  10.     double a = 1.0;
  11.     double b = c;
  12.     double m;
  13.  
  14.     while (b - a > eps) {
  15.         m = (a + b) / 2.0;
  16.         if (m * m > c) {
  17.             b = m;
  18.         } else {
  19.             a = m;
  20.         }
  21.     }
  22.  
  23.     double pkw = (a + b) / 2.0;
  24.     cout << pkw << endl;
  25.  
  26.     return 0;
  27. }
  28.  
Success #stdin #stdout 0s 5316KB
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https://ideone.com/pSs8oc
language:
C++ (gcc 8.3)
created:
2 days ago
visibility:
public

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