Задача: Distinct Array

DistinctArray.cs

using System;
using System.Linq;
					
public class Program
{
	private static int DistinctArray(ref int[] arr)
	{
		int i, j;
		for (i = 0, j = 1; j < arr.Length; j++)
		{
			if (arr[i] != arr[j])
			{
				i++;
				arr[i] = arr[j];
			}
		}

		return i + 1; // size of squashed array (w/o duplicated)
	}

	public static void Main()
	{
		Console.WriteLine("UniLecs");
		
		int[] arr = new int[] { -9, -9, -9, 0, 0, 1, 2, 2, 5, 5, 6 };
		int newSize = DistinctArray(ref arr);
		Console.WriteLine(string.Format("Sorted arr w/o duplicates = [{0}]", string.Join(", ", arr.Take(newSize))));
		
		arr = new int[] { 1, 1, 1, 3, 3, 5, 7, 7, 7, 7, 11 };
		newSize = DistinctArray(ref arr);
		Console.WriteLine(string.Format("Sorted arr w/o duplicates = [{0}]", string.Join(", ", arr.Take(newSize))));		
	}
}