import java.util.Scanner;

/**

* This class converts a Binary number to a Decimal number

*

* @author Unknown

*

*/

class BinaryToDecimal

{

/**

* Main Method

*

* @param args Command line arguments

*/

public static void main(String args[])

{

Scanner sc=new Scanner(System.in);

int n,k,d,s=0,c=0;

System.out.print("Binary number: ");

n=sc.nextInt();

k=n;

while(k!=0)

{

d=k%10;

s+=d*(int)Math.pow(2,c++);

k/=10;

}

System.out.println("Decimal equivalent:"+s);

sc.close();

}

}