using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Enter modulus source: ");

        string input = Console.ReadLine();

        var x = functionModulus(Convert.ToInt32(input));

        foreach (int num in x) {

            Console.WriteLine(num);

        }

    }

    static int a = 1;

    static int b = 1;

    static int[] functionModulus(int n)

    {

        int m = n;

        Console.WriteLine("Pre-increment: ");

        for (; n % ++a > 0; ) {

            Console.WriteLine(a);

        }

        Console.WriteLine(a);

        Console.WriteLine("Post-increment: ");

        for (; n % b++ > 0; ) {

            Console.WriteLine(b);

        }

        Console.WriteLine(b);

        return new[] {n = n/a + a >> 1, n - a, m = m/b + b >> 1, m - b};

    }

}