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

public class Program
{

    public void Proc()
    {
        int num = int.Parse(Reader.ReadLine());
        this.SankakuList = this.GetSankakuList(num);
        int ans = 3;
        if(this.SankakuList.Contains(num)) {
            ans = 1;
        } else {
            for (int i = 0; i < this.SankakuList.Count; i++) {
                for (int j = i; j < this.SankakuList.Count; j++) {
                    if(this.SankakuList[i]+this.SankakuList[j]==num) {
                        ans = 2;
                        break;
                    }
                }
                if(ans!=3){
                    break;
                }
            }
        }
        Console.WriteLine(ans);
    }

    private List<int> SankakuList;

    private List<int> GetSankakuList (int max) {
        List<int> ret = new List<int>();
        for (int i = 1; i <= max; i++) {
            int num = i * (i + 1) / 2;
            if(num>max) {
                break;
            }
            ret.Add(num);
        }
        return ret;
    }
  

    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 = @"



12




";
    }

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