// -----------------------------------------------------------------------

//  <copyright file="OrdinalSums.cs" company="Appriss Retail">

//      Copyright (c) Appriss Retail. All rights reserved.

//  </copyright>

// -----------------------------------------------------------------------

​

// We've added some extra using that you may need

// Most IDE's would add them for you, but this website won't

using System;

using System.Collections.Generic;

using System.Linq;

​

public class Program

{

    public static int[] GetNumOrdinalsThatSumToTarget(int[] nums, int target)

    {

        // Given an array of integers (nums), return indices (ordinals, indexes in a array) of the two numbers that add up to target.

        // You may not use the same array element twice.

        // For example, nums : 2, 7, 11, 15 

        //            target : 18

        // In this case 7 (index 1) and 11 (index 2) sum to 18, so we would return { 1, 2 } 

        // If the target is 22, 7 + 15, we would return { 1, 3 }

        // If there is no valid result, throw a descriptive exception

​

        int[] resultOrdinals = new int[2];

​

        // Implement your logic here

        return resultOrdinals;

    }

​

    public static void Main()

    {

        Console.WriteLine("Appriss Retail - Ordinal Sums");

        Console.WriteLine("Appriss Retail - Ordinal Sums");

​

        int[] nums = new int[] { 2, 7, 11, 15 };

        // Call 1

        int[] result1 = GetNumOrdinalsThatSumToTarget(nums, 18);

        if (result1?.Length != 2)

        {

            throw new Exception("Two Results Expected");

        }

​

        if (result1[0] != 1 && result1[1] != 2)

        {

            throw new Exception("Invalid result for target 18");

        }

​

        // Call 2

        int[] result2 = GetNumOrdinalsThatSumToTarget(nums, 22);

        if (result2?.Length != 2)

        {

            throw new Exception("Two Results Expected");

        }

​

        if (result2[0] != 1 && result2[1] != 3)

        {

            throw new Exception("Invalid result for target 22");

        }

​

        // Call 3

​

        try

        {

            GetNumOrdinalsThatSumToTarget(nums, int.MaxValue);

            Console.WriteLine("Call 3 DID NOT throw an exception as expected.");

        }

        catch (Exception e)

        {

            Console.WriteLine($"Call 3 failed, as expected, with error: {e.Message}");

        }

        // Add more test calls if you like

    }

}