using System;
using System.Linq;
using System.Collections.Generic;
using System.Text.RegularExpressions;


class Program
{
    static void Main()
    {
        var N = long.Parse(Console.ReadLine());
        //Console.WriteLine(((N - 1) * 52) + 316);

          long ans = 0;
        if (N >= 2)
            {
                ans = 316 + (52 * (N - 1));
            }
            else if(N==1)
            {
                ans = N * 316;
            }
            Console.WriteLine(ans);
       
    }
}