using System;

public class Program

{

    public static void Main()

    {   

        string[] nums = Console.ReadLine().Split(' ');

        double sum = 0.0d;

        for (int i = 0; i < nums.Length; i++)

        {

​

            sum += double.Parse(nums[i]);

        }

        Console.WriteLine(sum);

    }

}

​