square root

import java.util.*;

class Square {

static float squareRoot(int num, int precision)
{
    int start = 0, end = num;
    int mid;

    
    double ans = 0.0;

    
    while (start <= end) {
        mid = (start + end) / 2;

        if (mid * mid == num) {
            ans = mid;
            break;
        }

        
        if (mid * mid < num) {
            start = mid + 1;
            ans = mid;
        }

       
        else {
            end = mid - 1;
        }
    }

   
    double increment = 0.1;
    for (int i = 0; i < precision; i++) {
        while (ans * ans <= num) {
            ans += increment;
        }

        
        ans = ans - increment;
        increment = increment / 10;
    }
    return (float)ans;
}


public static void main(String[] args)
{
    
    System.out.println(squareRoot(75, 3));

   
    
}

}