using System;

class MaxSequenceOfEqualElements
{
    static void Main()
    {
        int[] arr = { 2, 1, 1, 2, 3, 3, 2, 2, 2, 1 };
        int start = 0;
        int len = 1;
        int bestStart = 0;
        int bestLen = 1;

        for (int i = 0; i <= arr.Length - 1; i++)
        {
            if (arr[i + 1] == arr[i])
            {
                len++;
                if (bestLen<len)
                {
                    bestLen = len;
                    bestStart = start;
                }
            }
            else
            {
                start = i + 1;
                len = 1;
            }
        }
        for (int n = bestStart; n < bestStart + bestLen; n++)
        {
            Console.WriteLine(arr[n]);
        }
    }
}