using System;
using System.Collections.Generic;

public class HelloWorld
{
    public static void Main(string[] args)
    {
        int[] A = { 1, 3, 3, 7, 9, 9, 9, 9, 11, 11, 12, 14 };
        
        Dictionary<int, int> frequencyMap = new Dictionary<int, int>();
        
        for (int i = 0; i < A.Length; i++)
        {
            int num = A[i];
            if (frequencyMap.ContainsKey(num))
            {
                frequencyMap[num]++;
            }
            else
            {
                frequencyMap[num] = 1;
            }
        }

        int maxCount = 0;
        int mostFrequentElement = A[0];

        foreach (var kvp in frequencyMap)
        {
            if (kvp.Value > maxCount)
            {
                maxCount = kvp.Value;
                mostFrequentElement = kvp.Key;
            }
        }

        Console.WriteLine(maxCount);
    }
}