using System;
public class Exercise6
{
    public static void Main()
    {
        int  n,ctr=0;
        int[] arr1 = new int[100];
        int i, j, k;
        Console.Write("\n\nPrint all unique elements of an array:\n");
        Console.Write("------------------------------------------\n");
        Console.Write("Input the number of elements to be stored in the array :");
        n = Convert.ToInt32(Console.ReadLine());
        Console.Write("Input {0} elements in the array :\n",n);
        for(i=0; i<n; i++)
            {
                Console.Write("element - {0} : ",i);
                arr1[i] = Convert.ToInt32(Console.ReadLine());
            }
        /*Checking duplicate elements in the array */
        Console.Write("\nThe unique elements found in the array are : \n");
        for(i=0; i<n; i++)
            {
                ctr=0;
                /*Check duplicate bifore the current position and
                increase counter by 1 if found.*/
                for(j=0; j<i-1; j++)
                    {
                        /*Increment the counter when the seaarch value is duplicate.*/
                        if(arr1[i]==arr1[j])
                            {
                                ctr++;
                            }
                    }
                /*Check duplicate after the current position and
                  increase counter by 1 if found.*/
                for(k=i+1; k<n; k++)
                    {
                        /*Increment the counter when the seaarch value is duplicate.*/
                        if(arr1[i]==arr1[k])
                            {
                                ctr++;
                            }
                    }
                /*Print the value of the current position of the array as unique value
                when counter remain contains its initial value.*/
                if(ctr==0)
                    {
                        Console.Write("{0} ",arr1[i]);
                    }
            }
        Console.Write("\n\n");
    }
}