namespace Ex12_TestNumbers
{
    using System;
    public class Program
    {
        public static void Main(string[] args)
        {
            int N = int.Parse(Console.ReadLine());
            int M = int.Parse(Console.ReadLine());
            int max = int.Parse(Console.ReadLine());

            int sumMultiply = 0;
            int counter = 0;

            for (int i = N; i >= 1; i--)
            {
                for (int j = 1; j <= M; j++)
                {
                    counter++;
                    sumMultiply = sumMultiply + (3 * (i * j));

                    if (sumMultiply >= max)
                    {
                        break;
                    }
                }

                if (sumMultiply >= max)
                {
                    break;
                }
            }

            if (sumMultiply >= max)
            {
                Console.WriteLine($"{counter} combinations");
                Console.WriteLine($"Sum: {sumMultiply} >= {max}");
            }
            else
            {
                Console.WriteLine($"{counter} combinations");
                Console.WriteLine($"Sum: {sumMultiply}");
            }
        }
    }
}