import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int w=sc.nextInt(); //一行的宽度 6 8
        int m=sc.nextInt(); //2 92
        int n=sc.nextInt(); //8 16
        int x1=m%w==0?m/w-1:m/w;; //0 11
        int x2=n%w==0?n/w-1:n/w; //1 2
        int y1=m%w==0?w:m%w; //2  4
        int y2=n%w==0?w:n%w; //2  8
        //奇偶行判断
        if(!(x1%2==0)) { //判断如果是奇数行，则调整改变列号
            y1=w-y1+1; 
        }
        if(!(x2%2==0)) { //判断如果是奇数行，则调整改变列号
            y2=w-y2+1; //5
        }
        System.out.println(Math.abs(x1-x2)+Math.abs(y1-y2));
    }

}