using System;
using System.IO;
using System.Linq;
using System.Collections.Generic;
using System.Text;

public class Program
{

    public void Proc()
    {
        long inpt = long.Parse(Reader.ReadLine());
        this.Sheep = inpt;
        Nullable<long> ans = GetAns(1, inpt);
        if(ans == null) {
            Console.WriteLine("NO");
            return;
        }
        Console.WriteLine("YES");
        Console.WriteLine(ans.Value);
    }

    private long Sheep;

    private Nullable<long> GetAns(long min, long max) {
        if(max-min<=1) {
            if(GetNum(max)==this.Sheep) {
                return max;
            } 
            if(GetNum(min)==this.Sheep) {
                return min;
            }

            return null;
        }
        long mid = (max + min) / 2;
        if(mid.ToString().Length>=10) {
            return GetAns(min, mid);
        }
        decimal midNum = GetNum(mid);
        if(midNum==Sheep) {
            return mid;
        }
        if(midNum>Sheep) {
            return GetAns(min, mid);
        } else {
            return GetAns(mid, max);
        }
    }

    private decimal GetNum(long n) {
        decimal tmp = n;
        return n * (n + 1m) / 2m;
    }

    public class Reader
    {
        private static StringReader sr;
        public static bool IsDebug = false;
        public static string ReadLine()
        {
            if (IsDebug)
            {
                if (sr == null)
                {
                    sr = new StringReader(InputText.Trim());
                }
                return sr.ReadLine();
            }
            else
            {
                return Console.ReadLine();
            }
        }
        private static string InputText = @"


2000000000000000000


";
    }

    public static void Main(string[] args)
    {
#if DEBUG
        Reader.IsDebug = true;
#endif
        Program prg = new Program();
        prg.Proc();
    }
}