using System;
using System.Linq;

class Program
{
    static void Main()
    {
        long[] l = Console.ReadLine().Split().Select(long.Parse).ToArray();
        long n = l[2];

        int ans = 88;

        if (n % 3 == 1) ans = 79;
        else if (n % 3 == 2) ans = 23;

        Console.WriteLine(ans);
    }
}