CountNums - Dicitionaries

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CountNumbers
{
    class CountNumbers
    {
        static void Main()
        {
            decimal[] nums = Console.ReadLine().Split(' ').Select(decimal.Parse).ToArray();
            SortedDictionary<decimal, int> numbers = new SortedDictionary<decimal, int>();
            foreach(var num in nums)
            {
                numbers[num] = 0;
            }
            foreach(var num in nums)
            {
                numbers[num]++;
            }
            foreach(var n in numbers.Keys)
            {
                if(numbers[n] > 0)
                {
                    Console.WriteLine("{0} -> {1}",n,numbers[n]);
                }
            }
        }
    }
}