using System.Numerics;

public class Program
{
    public static void Main()
    {
        //int num = int.Parse(Console.ReadLine() ?? string.Empty);
        string[] str = (Console.ReadLine() ?? string.Empty).Trim().Split(' ');
        //string color = Console.ReadLine() ?? string.Empty;

        int a = int.Parse(str[0]);
        int b = int.Parse(str[1]);  

        int total = a+ b;
        int sa = a - b;
        sa = int.Parse(sa.ToString().Replace("-", ""));

        Console.WriteLine(total-sa);

    }
}