using System;

namespace ConsoleApp9
{
    class Program
    {
        static void Main(string[] args)
        {
            double[] a = new double[5];
            for (int i = 0; i < 5; i++)
            {
                double numbers = double.Parse(Console.ReadLine());
                a[i] += numbers;
            }
            Array.Sort(a);
            Array.Reverse(a);
            Console.WriteLine(a[0]);
        }
    }
}