using System;

public class Program
{
	public static void Main()
	{
		int[] nums = new int[5];
		int a;
		int arraySeq;
		int target;
		bool reset = true;

		do
		{
			for (arraySeq = 0; arraySeq < nums.Length; arraySeq++)
			{
				for (a = 1; a <= arraySeq; a++) { }

				Console.Write("insert the number #" + a + " = ");
				nums[arraySeq] = int.Parse(Console.ReadLine());
				for (int i = 0; i < arraySeq; i++)
				{
					if (nums[arraySeq] == nums[i])
					{
						reset = true;
						Console.WriteLine("You can't insert the same number");
						Console.ReadKey();
						Console.Clear();
						break;
					}
					else
					{
						reset = false;
					}
				}
				if(reset == true)break;
			}
		}while(reset == true);
	}
}