using System;
using System.Linq;

public class yukicoder
{
    public static void Main()
    {
        long[] input = Console.ReadLine().Split(' ').Select(x => long.Parse(x)).ToArray();
        long a = input[0] * -1;
        long b = input[1];
        
        Console.WriteLine((a - b) * -1);

    }
}