using System;

public class Hello
{
    public static void Main()
    {
        var n = long.Parse(Console.ReadLine().Trim());
        if (n == 1) { Console.WriteLine("YES"); Console.WriteLine(1); goto end; }
        var res = search(n);
        if (res * (res + 1)/2L == n)
        {
            Console.WriteLine("YES");
            Console.WriteLine(res);
        }
        else Console.WriteLine("NO");
        end:;
    }
    public static long search (long n)
    {
        var ng = 1L;
        var ok = (long)Math.Sqrt(2 * n) + 1;
        while (ok - ng > 1)
        {
            var mid = ng + (ok - ng) / 2L;
            if (calc(mid, n)) ok = mid;
            else ng = mid;
        }
        return ok;
    }
    public static bool calc (long a , long n) => a * (a + 1) / 2 >= n;
}