using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace _7.Count_Numbers
{
class Program
{
static void Main(string[] args)
{
var numbers = Console.ReadLine().Split(new char[] {' '},StringSplitOptions.RemoveEmptyEntries).Select(int.Parse).ToList();
numbers.Sort();
numbers.Add(0);
var counter = 1;
for (int cnt = 0; cnt < numbers.Count - 1; cnt++)
{
if (numbers[cnt] == numbers[cnt +1])
{
counter++;
} else
{
Console.WriteLine($"{numbers[cnt]} -> {counter}");
counter = 1;
}
}
}
}
}
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