using System;
using System.Collections.Generic;
using System.Text;
using System.Linq;
 
class Program
{
    public void Proc()
    {
        Reader.IsDebug = false;
        int[] inpt = Reader.GetInt();
        int a = inpt[0];
        int b = inpt[1];
        int startPos = inpt[2];
        
        int ans = this.GetAns(a,b, startPos);
        Console.WriteLine(ans);

    }
    
    private int GetAns(int a, int b, int pos) {
        int move = 0;
        if(pos == 1) {
            // 下ボタンを押せば確実にAが動く
            move += (Math.Abs(pos - a));
            move += 1;
            return move;
        } else if(Math.Abs(pos - b) < Math.Abs(pos - a)) {
            // Bが来る
            // Aと同じ階か1Fに行く
            move += (Math.Abs(pos - b));
            b = pos;
            int tmp1 = this.GetAns(a, a, a) + Math.Abs(b - a);
            int tmp2 = this.GetAns(a, 1, 1) + Math.Abs(b-1);
            move += Math.Min(tmp1, tmp2);
            return move;
        } else {
            // Aが来る
            move += Math.Abs(pos - a);
            move += pos;
            return move;
        }
    }

    

 
    public class Reader
    {
        public static bool IsDebug = true;
        private static String PlainInput = @"


31 10 20

 
";
        private static System.IO.StringReader Sr = null;
        public static string ReadLine()
        {
            if (IsDebug)
            {
                if (Sr == null)
                {
                    Sr = new System.IO.StringReader(PlainInput.Trim());
                }
                return Sr.ReadLine();
            }
            else
            {
                return Console.ReadLine();
            }
        }
        public static int[] GetInt(char delimiter = ' ', bool trim = false)
        {
            string inptStr = ReadLine();
            if (trim)
            {
                inptStr = inptStr.Trim();
            }
            string[] inpt = inptStr.Split(delimiter);
            int[] ret = new int[inpt.Length];
            for (int i = 0; i < inpt.Length; i++)
            {
                ret[i] = int.Parse(inpt[i]);
            }
            return ret;
        }
    }
    static void Main()
    {
        Program prg = new Program();
        prg.Proc();
    }
}