Number Generator

using System;

namespace NumberGenerator
{
    internal class Program
    {
        static void Main(string[] args)
        {
            int m = int.Parse(Console.ReadLine());
            int n = int.Parse(Console.ReadLine());
            int l = int.Parse(Console.ReadLine());
            int special = int.Parse(Console.ReadLine());
            int control = int.Parse(Console.ReadLine());

            for (int i = m; i > 0; i--)
            {
                for (int j = n; j > 0; j--)
                {
                    for (int k = l; k > 0; k--)
                    {
                        int num = i * 100 + j * 10 + k;

                        if (num % 3 == 0)
                        {
                            special += 5;
                        }
                        else if (num % 5 == 0)
                        {
                            special -= 2;
                        }
                        else if (num % 2 == 0)
                        {
                            special *= 2;
                        }

                        if (special >= control)
                        {
                            Console.WriteLine($"Yes! Control number was reached! Current special number is {special}.");
                            Environment.Exit(0);
                        }
                    }
                }
            }
            Console.WriteLine($"No! {special} is the last reached special number.");
        }
    }
}