import java.util.*; import java.lang.*; import java.io.*; class BinaryToDecimal { // *More methods can be added* public static int binaryToDecimal(String binaryString) { // *Code goes here* } } class...

import java.util.*;

import java.lang.*;

import java.io.*;

class BinaryToDecimal {

// *More methods can be added*

public static int binaryToDecimal(String binaryString) {

// *Code goes here*

}

}

class DriverMain {

public static void main(String args[]) {

Scanner input = new Scanner(System.in);

System.out.print(BinaryToDecimal.binaryToDecimal(input.nextLine()));

}

}