using System;
using System.Collections.Generic;
using System.Linq;
using static System.Console;

class Program
{
    static void Main()
    {
        var n = long.Parse(ReadLine());
        var a = (long)Math.Sqrt(2 * n);
        var b = false;
        var c = 0L;
        for (long i = a - 4; i < a + 9; i++)
        {
            if (i * (i + 1) / 2 == n)
            {
                b = true;
                c = i;
            }
        }
        WriteLine(b ? "YES" : "NO");
        if (b) WriteLine(c);
    }
}