import java.io.*;

import java.util.*;

import java.text.*;

import java.math.*;

import java.util.regex.*;

public class Solution {

public static void main(String[] args) {

Scanner scn = new Scanner(System.in);

int N = scn.nextInt();

int P = scn.nextInt();

System.out.println(squareRoot(N, P));

}

public static double squareRoot(int N, int P) {

double sqrt = 0;;

// Write your code here

double root = Math.pow(N, 0.5);

int pre = (int) Math.pow(10, P);

root = root * pre;

sqrt = (int)root;

return (double)sqrt/pre;

}

}