using System;

public class Program

{

    public static void Main()

    {

        int i=0,j;

        Console.WriteLine("enter n");

        int n = int.Parse(Console.ReadLine());

        Console.WriteLine("enter k");

        int k = int.Parse(Console.ReadLine());

        int[] a = new int[20];

        while(n!=0)

        {

            a[i]=n%2;

            n=n/2;

            i++;

        }

        for(j=0;j<i;j++)

        {

            if(j!=i-k)

            {

                if(a[j]==0)

                {

                    a[j]=1;

                }

                else

                {

                    a[j]=0;

                }

            }

        }

        for(j=0;j<i;j++)

        {

        Console.Write("{0}",a[j]);

        }

    }

}