using System;

public class Program

{

    public static void Main()

    {

        int[] n = {1,1,2,2,3,4,5,5};

        int[] fr1 = new int[100];

        var size = n.Length;

        int count=0,i,j;

        for (i = 0; i < size; i++)

        {           

            fr1[i] = -1;  // Initialize frequency array with -1

        }

​

        for ( i = 0; i < size; i++)

        {

             count = 1; 

            for ( j = i + 1; j < size; j++)

            {

                if (n[i] == n[j])

                {

                    count++;                    

                    fr1[j] = 0;

                }

            }

              if (fr1[i] != 0)  // If not a duplicate

            {

                fr1[i] = count;  // Store the frequency

            }

        }

         Console.Write("\nThe frequency of all elements of the array : \n");

        for (i = 0; i < size; i++)

        {

            if (fr1[i] != 0)  // If frequency is not 0 (indicating duplicate)

            {

                Console.Write("{0} occurs {1} times\n", n[i], fr1[i]);  // Display element and its frequency

            }

        }

    }

}