TwoSum

CSharp · Console

/Program.cs

using System;
using System.Collections.Generic;
					
public class Program
{
	public static int[] TwoSum(int[] nums, int target) {
        var hash = new Dictionary<int, int>();

        for (int i = 0; i < nums.Length; ++i) 
            if (hash.TryGetValue(target - nums[i], out int index)) 
                return new int[]{index, i};
            else 
                hash.TryAdd(nums[i], i);

        return Array.Empty<int>();
    }
	
	public static void Main()
	{
		int[] numbers = new int[] {1,1,1,1,1,4,1,1,1,1,1,7,1,1,1,1,1};
		int[] result = TwoSum(numbers, 11);
		
		Console.WriteLine(string.Join(", ", result));
	}
}