using System;

public class Program

{

    public static void Main()

    {

        long Binarynum = 10000010;

        long decimalnum = 0;

        long d = 1;

        long i = 1;

        long p;

        for (long j = Binarynum; j> 0; j= j/10){

            p = j % 10;

            if (i == 1) {

                d = d * 1 ;

            }

            else {

                d = d * 2;

            }

            decimalnum = decimalnum + (d*p);

            i++;

        }

        Console.Write(decimalnum);

    }

}