using System;

namespace StudyApp
{
    class Program
    {
        static void Main(string[] args)
        {
            string input = Console.ReadLine();
            CanSleep(double.Parse(input));
        }

        public static void CanSleep(double target_num)
        {
            double second = 0; // Total seconds
            double sheep_num = 0; // The number of sheep

            while (true)
            {
                sheep_num += second;

                if (target_num > sheep_num)
                    second++;
                else
                    break;
            }

            if (target_num.Equals(sheep_num))
            {
                Console.WriteLine("YES");
                Console.WriteLine(second);
            }
            else
            {
                Console.WriteLine("NO");
            }
        }
    }
}