12. Test Numbers

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _12_Test_Numbers
{
    class Program
    {
        static void Main(string[] args)
        {
            int N = int.Parse(Console.ReadLine());
            int M = int.Parse(Console.ReadLine());
            int MaxSum = int.Parse(Console.ReadLine());
            int sum = 0;
            int comb = 0;
            for (int i = N; i >= 1; i--)
            {
                for (int j = 1; j <= M; j++)
                {
                    int result = i * j * 3;
                    comb++;
                    sum += result;
                    if (sum >= MaxSum)
                    {
                        Console.WriteLine($"{comb} combinations");
                        Console.WriteLine($"Sum: {sum} >= {MaxSum}");
                        break;
                    }
                }
                if (sum >= MaxSum)
                {
                    break;
                }
            }
            if (sum < MaxSum)
            {
                Console.WriteLine($"{comb} combinations");
                Console.WriteLine($"Sum: {sum}");
            }

        }
    }
}