using System;
using System.Collections.Generic;
using System.Numerics;
using System.Text;


namespace newEX
{
    class Program
    {
        static void Main(string[] args)
        {
            string input = Console.ReadLine();
            List<int> rev = getRev(input);
            int sum = rev[0];
            for (int i = 1; i < rev.Count; i++)
            {
                sum += rev[i];
            }
            Console.WriteLine(sum);
        }

        private static List<int> getRev(string input)
        {
            char[] temp = input.ToCharArray();
            Array.Reverse(temp);
            string inp = new string(temp);
            string[] a = inp.Split();
            List<int> numbers = new List<int>();

            for (int i = 0; i < a.Length; i++)
            {
                numbers.Add(int.Parse(a[i]));
            }
            return numbers;
        }
    }
}