using System;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine(string.Join(",", TwoSum(new[]{3, 3}, 6)));

    }

​

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

    {

        var solution = new int[2];

        var numsTemp = new int[nums.Length];

        Array.Copy(nums, numsTemp, nums.Length);

        for (int index = 0; index < numsTemp.Length; index++)

        {

            int currentNum = numsTemp[index];

            for (int innerIndex = 0; innerIndex < numsTemp.Length; innerIndex++)

            {

                if (Array.IndexOf(nums, currentNum) != Array.IndexOf(nums, numsTemp[innerIndex]))

                {

                    int result = currentNum + numsTemp[innerIndex];

                    if (result == target)

                    {

                        solution[0] = Array.IndexOf(nums, numsTemp[innerIndex]);

                        int next = 0;

                        if (currentNum == numsTemp[innerIndex])

                        {

                            next = Array.IndexOf(nums, numsTemp[innerIndex]) + 1;

                        }

​

                        solution[1] = Array.IndexOf(nums, currentNum, next);

                        break;

                    }

                }

            }

        }

​

        return solution;

    }

}