import java.util.*;
import java.io.*;
import java.math.*;
import java.util.Scanner;

public class HexToDecimal {

	public static void main(String[] args) {
		System.out.print("Hexadecimal Input:");

		Scanner s = new Scanner(System.in);
		String inputHex = s.nextLine();
		try{

			Integer outputDecimal = Integer.parseInt(inputHex, 16);
			System.out.println("Decimal Equivalent : "+outputDecimal);
		}
		catch(NumberFormatException ne){

			System.out.println("Invalid Input");
		}
		finally{
			s.close();
		}

	}

}