Solution

import java.util.Scanner;

public class Demo2 {
    public static void main(String[] args) {
        Scanner console = new Scanner(System.in);
        double num = Double.parseDouble(console.nextLine());

        int lastDigit = (int) num % 10;
        int firstDigitAfterDEcimal = (int)(num * 10) % 10;

       int sum = lastDigit + firstDigitAfterDEcimal;
        System.out.println(sum);
    }
}