import java.util.*;

public class A {
   
      static float squareRoot(int number, int precision)
    {
        int start = 0, end = number;
        int mid;
 
        
        double ans = 0.0;
 
        
        while (start <= end) {
            mid = (start + end) / 2;
 
            if (mid * mid == number) {
                ans = mid;
                break;
            }
 
           
            if (mid * mid < number) {
                start = mid + 1;
                ans = mid;
            }
 
           
            else {
                end = mid - 1;
            }
        }
 
        
        double increment = 0.1;
        for (int i = 0; i < precision; i++) {
            while (ans * ans <= number) {
                ans += increment;
            }
 
            
            ans = ans - increment;
            increment = increment / 10;
        }
        return (float)ans;
    }
 
   
    public static void main(String[] args)
    {
        
        System.out.println(squareRoot(50, 3));
 
        
        System.out.println(squareRoot(10, 4));
    }
}