PrintSequence

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

class PrintASequence
{
    static void Main(string[] args)
    {
        for (int i = 2; i < 12; i++)
        {
            if ((i % 2) == 0)
            {
                Console.WriteLine(i);
            }
            else
            {
                Console.WriteLine("-{0}", i);
            }
        }
    }
}