using System;

namespace Sum_of_Two_Numbers
{
    class Program
    {
        static void Main(string[] args)
        {
            int start = int.Parse(Console.ReadLine());
            int end = int.Parse(Console.ReadLine());
            int magicNumber = int.Parse(Console.ReadLine());
            int counter = 0;

            for (int i = start; i <= end; i++)
            {
                for (int j = start; i <=magicNumber; j++)
                {
                    counter++;

                    if (start + j == magicNumber)
                    {

                        Console.WriteLine($"Combination N:{counter} ({i} + {j} = {magicNumber})");

                        return;

                    }

                }

            }
            Console.WriteLine($"{counter} combinations - neither equals {magicNumber}" );

        }
    }
}