static int numberOfLoops;
        static int numberOfIterations;
        static int[] loops;

        static void Main()
        {
            Console.Write("N = ");
            numberOfLoops = int.Parse(Console.ReadLine());
            numberOfIterations = numberOfLoops;
            loops = new int[numberOfLoops];
            NestedLoops(0);

        }

        static void NestedLoops(int currentLoop)
        {
            if (currentLoop == numberOfLoops)
            {
                PrintLoops();
                return;
            }
            for(int counter = 1; counter <= numberOfIterations; counter++)
            {
                loops[currentLoop] = counter;
                NestedLoops(currentLoop + 1);
            }
        }
        static void PrintLoops()
        {
            for(int i = 0; i < numberOfLoops; i++)
            {
                Console.Write("{0} ",loops[i]);

            }
            Console.WriteLine();
        }