using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        int[] s = {2, 3, 5,6, 8, 10, 12};

        int[] result = TwoSum(s, 14);

        Console.WriteLine(string.Join(", ", result));

    }

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

        var map = new Dictionary<int, int>();

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

            var compliment = target - nums[i];

            if(map.ContainsKey(compliment)) {

                return new int[] { map[compliment], i };

            } else {

                map.Add(nums[i], i);    

            }

        }

        return new int[] { };

    }

}