static int[] findAllRegistrars(int ppl)
        {
            int[] arr = new int[3];
            for (int i = 0; i < ppl; i++)
            {
                Console.Write("Please enter where do u want to go: ");
                arr[int.Parse(Console.ReadLine())]++;
            }
            return arr;
        }
        static int howMuchRooms(int[] arr, int acti)
        {
            return arr[acti] < 40 ? 1 : 2;
        }
        static int start()
        {
            Console.Write("Please enter how many ppl: ");
            int[] arr = findAllRegistrars(int.Parse(Console.ReadLine()));
            int count = 0;
            for (int i = 0; i < 3; i++)
            {
                count += howMuchRooms(arr, i);
            }
            return count;
        }