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

class Program
{
    public static IO IO = new IO();
    static void Main(string[] args)
    {
        int n = IO.INT();
        QUEUE<PAIR<int, int>> Q = new QUEUE<PAIR<int, int>>(n + 1);
        bool[] f = new bool[n + 1];
        int o = -1;
        Q.PUSH(new PAIR<int, int>(1, 1));
        f[1] = true;
        while (Q.SIZE() != 0)
        {
            PAIR<int, int> b = Q.POP();
            int bit = BIT(b.KEY);
            if (b.KEY == n) { o = b.VALUE; break; } 
            int m = b.KEY - bit;
            int p = b.KEY + bit;
            if (m > 0 && !f[m]) { f[m] = true; Q.PUSH(new PAIR<int, int>(m, b.VALUE + 1)); }
            if (p < n + 1 && !f[p]) { f[p] = true; Q.PUSH(new PAIR<int, int>(p, b.VALUE + 1)); }
        }
        IO.WRITE(o);
        IO.FLUSH();
    }
    public static int BIT(int n)
    {
        int ret = 0;
        for (int i = 0; i < 32; i++)
        {
            if ((1 << i & n) != 0)
            {
                ret++;
            }
        }
        return ret;
    }
}

#region QUEUE
namespace LIB
{
    public class QUEUE<T>
    {
        private int m, s, e, c;
        private T[] q;
        public QUEUE(int max) { m = max; q = new T[m]; CLEAR(); }
        public void CLEAR() { e = 0; s = 0; c = 0; }
        public int SIZE() { return c; }
        public T TOP() { return q[0]; }
        public T POP() { T r = q[s++]; s %= m; c--; return r; }
        public void PUSH(T v) { q[e++] = v; e %= m; c++; }
        public bool EMPTY() { return SIZE() == 0; }
    }
}
#endregion
#region PAIR
namespace LIB
{
    public class PAIR<T, U> : IComparable where T : IComparable
    {
        public T KEY;
        public U VALUE;
        public PAIR(T key, U value) { KEY = key; VALUE = value; }
        public int CompareTo(object o) { PAIR<T, U> b = (PAIR<T, U>)(o); return KEY.CompareTo(b.KEY); }
    }
}
#endregion
namespace LIB
{
    public class IO
    {
        private const int WMAX = 1000;
        private StringBuilder S = new StringBuilder();
        private T R<T>(Func<string, T> f) { return f(Console.ReadLine()); }
        private T[] R<T>(Func<string, T> f, char c) { return STRING().Split(c).Select(f).ToArray(); }
        private T[] R<T>(Func<string, T> f, int l) { T[] r = new T[l]; for (int i = 0; i < l; i++) { r[i] = R(f); } return r; }
        private T[][] R<T>(Func<string, T> f, int l, char c) { T[][] r = new T[l][]; for (int i = 0; i < l; i++) { r[i] = R<T>(f, c); } return r; }
        private void W<T>(Func<T, string> f, T v, bool lf = true) { S.Append(f(v)); if (lf == true) { S.Append('\n'); } if (S.Length >= WMAX) { FLUSH(); } }
        public string STRING() { return R(s => s); }
        public string[] STRING(char c) { return R(s => s, c); }
        public string[] STRING(int l) { return R(s => s, l); }
        public string[][] STRING(int l, char c) { return R(s => s, l, c); }
        public int INT() { return R(int.Parse); }
        public int[] INT(char c) { return R(int.Parse, c); }
        public int[] INT(int l) { return R(int.Parse, l); }
        public int[][] INT(int l, char c) { return R(int.Parse, l, c); }
        public long LONG() { return R(long.Parse); }
        public long[] LONG(char c) { return R(long.Parse, c); }
        public long[] LONG(int l) { return R(long.Parse, l); }
        public long[][] LONG(int l, char c) { return R(long.Parse, l, c); }
        public double DOUBLE() { return R(double.Parse); }
        public double[] DOUBLE(char c) { return R(double.Parse, c); }
        public double[] DOUBLE(int l) { return R(double.Parse, l); }
        public double[][] DOUBLE(int l, char c) { return R(double.Parse, l, c); }
        public void WRITE(string s, bool lf = true) { W(v => v, s, lf); }
        public void WRITE(int s, bool lf = true) { W(v => v.ToString(), s, lf); }
        public void WRITE(long s, bool lf = true) { W(v => v.ToString(), s, lf); }
        public void WRITE(double s, bool lf = true) { W(v => v.ToString(), s, lf); }
        public void FLUSH() { Console.Write(S); S.Length = 0; }
    }
}