razpredelyane na chisla

using System;
using System.Collections.Generic;
public class Program
{
    public static void Main()
    {
        int[] numbers = {1, 5, 15, 5, 1, 1, 5, 15};
        Dictionary<int, int> st = new Dictionary<int, int>();
        foreach(int num in numbers)
        {
            if(st.ContainsKey(num))
            {
                st[num]++;
            }
            else
            {
                st[num]= 1;
            }
        }
         foreach( var el in st)
         {
            Console.WriteLine("{0} -> {1}", el.Key, el.Value);
         }
    }
}