using System.Collections.Generic;
using System;
using System.Linq;
using System.Drawing;

namespace yukicoder
{
    class Program
    {

        static void Main(string[] args)
        {
            var N = int.Parse(Console.ReadLine());
            int first = 316;
            long count = first + ((long)(N - 1) * 52);
            Console.WriteLine(count);
        }
    }
}