import java.util.Scanner;
public class Program {

	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		System.out.println("Enter a hex number");
		String hex=input.nextLine();


		int sum=0;

		for (int i=hex.length()-1; i>=0; i--){
			int dec=0;
			char hexChar=hex.charAt((hex.length()-1)-i);

			System.out.println(hexChar);

			if (hexChar>= 'A' && hexChar<='F'){
				dec=10+hexChar-'A';

			}
			else{
				dec=hexChar-'0';}
			System.out.println(dec);
			sum=(int) (sum+Math.pow(16.0,i)*dec);
	}
		System.out.print(sum);

		}

	}