import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int[] a = new int[3];
        a[0] = sc.nextInt();
        a[1] = sc.nextInt();
        a[2] = sc.nextInt();
        Arrays.sort(a);
        System.out.println((a[2] - a[1]) + (a[1] - a[0]));
    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int[] a = new int[3];
        a[0] = sc.nextInt();
        a[1] = sc.nextInt();
        a[2] = sc.nextInt();
        Arrays.sort(a);
        System.out.println((a[2] - a[1]) + (a[1] - a[0]));
    }
} Main public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int[] a = new int[3];
        a[0] = sc.nextInt();
        a[1] = sc.nextInt();
        a[2] = sc.nextInt();
        Arrays.sort(a);
        System.out.println((a[2] - a[1]) + (a[1] - a[0]));
    } main {
        Scanner sc = new Scanner(System.in);
        int[] a = new int[3];
        a[0] = sc.nextInt();
        a[1] = sc.nextInt();
        a[2] = sc.nextInt();
        Arrays.sort(a);
        System.out.println((a[2] - a[1]) + (a[1] - a[0]));
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int[] a = new int[3]; a new int[3] 3 a[0] = sc.nextInt() a[0] a 0 sc.nextInt() sc.nextInt sc a[1] = sc.nextInt() a[1] a 1 sc.nextInt() sc.nextInt sc a[2] = sc.nextInt() a[2] a 2 sc.nextInt() sc.nextInt sc Arrays.sort(a) Arrays.sort Arrays a System.out.println((a[2] - a[1]) + (a[1] - a[0])) System.out.println System.out System System.out (a[2] - a[1]) + (a[1] - a[0]) (a[2] - a[1]) a[2] a 2 a[1] a 1 (a[1] - a[0]) a[1] a 1 a[0] a 0 String[] args args public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int[] a = new int[3];
        a[0] = sc.nextInt();
        a[1] = sc.nextInt();
        a[2] = sc.nextInt();
        Arrays.sort(a);
        System.out.println((a[2] - a[1]) + (a[1] - a[0]));
    }
} public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int[] a = new int[3];
        a[0] = sc.nextInt();
        a[1] = sc.nextInt();
        a[2] = sc.nextInt();
        Arrays.sort(a);
        System.out.println((a[2] - a[1]) + (a[1] - a[0]));
    }
} Main
import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int[] a = new int[3];
        a[0] = sc.nextInt();
        a[1] = sc.nextInt();
        a[2] = sc.nextInt();
        Arrays.sort(a);
        System.out.println((a[2] - a[1]) + (a[1] - a[0]));
    }
}
