using System;

public class Program

{

    public static void Main()

    {

        int[] a = new int[] {2, 4, 6, 8, 9};

        int[] b = new int[] {3, 5, 7};

        int [] c = AddArray(a,b);

        Console.Write("a: ");

        Print_Array(a);

        Console.Write("b: ");

        Print_Array(b);

        Console.Write("\nc: ");

        Print_Array(c);

    }

    public static int[] AddArray(int[] nums1, int[] nums2)

    {

        int[] totalnums = new int[Math.Max(nums1.Length, nums2.Length)];

        int i = 0, j = 0, x = 0;

        while(i < nums1.Length && j < nums2.Length)

        {

            totalnums[x] = nums1[i] + nums2[j];

            x++; i++; j++;

        }

        if(i < nums1.Length)

        {

            for(; i < nums1.Length; i++)

            {

                totalnums[x] = nums1[i];

                x++;

            }

        }

        else

        {

            for(; j < nums2.Length; j++)

            {

                totalnums[x] = nums2[j];

                x++;

            }

        }

        return totalnums;

    }

    //prints the array

    public static void Print_Array(int[] nums)

    {

        for(int i = 0; i < nums.Length; i++)

        {

            if(i < nums.Length-1)

                Console.Write(nums[i] + ", ");

        }

        Console.Write(nums[nums.Length-1]);

        Console.WriteLine("\n");

    }

}