using System;

namespace _648
{
    class Program
    {
        static void Main(string[] args)
        {
            long n = long.Parse(Console.ReadLine());
            long a = (long)Math.Sqrt(n * 2);
            if (a * (a + 1) / 2 == n)
            {
                Console.WriteLine("YES");
                Console.WriteLine(a);
            }
            else
            {
                Console.WriteLine("NO");
            }
        }
    }
}