import javax.swing.*;
import java.util.Scanner;

   public class BinaryToDecimal{
      public BinaryToDecimal(){
        System.out.println("Please enter a binary number. Type \"exit\" when you are done.");
        Scanner sc = new Scanner(System.in); 
  
        while(sc.hasNext()){  
            String  userInput = sc.next(); 
            if(userInput.equals("exit"))
                break;
            long inputNumber=Long.parseLong(userInput);
            System.out.println(userInput + "--->" + convertToDecimal(inputNumber));
        }
      } 
   
    public long convertToDecimal(long inputNumber){ 
        long remainder=inputNumber%10;
        long remains=inputNumber/10;
        long result=remainder;
        long digit=0;
        while(remains!=0){
            remainder=remains%10;
            remains/=10;
            digit+=1;
            result+=remainder*Math.round(Math.pow(2, digit));
        }
	    return result;
    }
     
    public static void main( String args[] ){ 
         new BinaryToDecimal();
    }
   }