import java.util.Arrays;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        @SuppressWarnings("resource")
        Scanner sc = new Scanner(System.in);
        int[] a = new int[3];
        for (int i = 0 ; i < 3 ; i++) {
            a[i] = sc.nextInt();
        }
        Arrays.sort(a);
        System.out.println(a[1] - a[0] + a[2] - a[1]);
    }

} import java.util.Arrays; Arrays java.util import java.util.Scanner; Scanner java.util public class Main {

    public static void main(String[] args) {
        @SuppressWarnings("resource")
        Scanner sc = new Scanner(System.in);
        int[] a = new int[3];
        for (int i = 0 ; i < 3 ; i++) {
            a[i] = sc.nextInt();
        }
        Arrays.sort(a);
        System.out.println(a[1] - a[0] + a[2] - a[1]);
    }

} Main public static void main(String[] args) {
        @SuppressWarnings("resource")
        Scanner sc = new Scanner(System.in);
        int[] a = new int[3];
        for (int i = 0 ; i < 3 ; i++) {
            a[i] = sc.nextInt();
        }
        Arrays.sort(a);
        System.out.println(a[1] - a[0] + a[2] - a[1]);
    } main {
        @SuppressWarnings("resource")
        Scanner sc = new Scanner(System.in);
        int[] a = new int[3];
        for (int i = 0 ; i < 3 ; i++) {
            a[i] = sc.nextInt();
        }
        Arrays.sort(a);
        System.out.println(a[1] - a[0] + a[2] - a[1]);
    } @SuppressWarnings("resource")
        Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int[] a = new int[3]; a new int[3] 3 for (int i = 0 ; i < 3 ; i++) {
            a[i] = sc.nextInt();
        } int i = 0 ; int i = 0 ; i 0 i < 3 i 3 i++ i++ i {
            a[i] = sc.nextInt();
        } {
            a[i] = sc.nextInt();
        } a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc Arrays.sort(a) Arrays.sort Arrays a System.out.println(a[1] - a[0] + a[2] - a[1]) System.out.println System.out System System.out a[1] - a[0] + a[2] - a[1] a[1] - a[0] + a[2] a[1] - a[0] a[1] a 1 a[0] a 0 a[2] a 2 a[1] a 1 String[] args args public class Main {

    public static void main(String[] args) {
        @SuppressWarnings("resource")
        Scanner sc = new Scanner(System.in);
        int[] a = new int[3];
        for (int i = 0 ; i < 3 ; i++) {
            a[i] = sc.nextInt();
        }
        Arrays.sort(a);
        System.out.println(a[1] - a[0] + a[2] - a[1]);
    }

} public class Main {

    public static void main(String[] args) {
        @SuppressWarnings("resource")
        Scanner sc = new Scanner(System.in);
        int[] a = new int[3];
        for (int i = 0 ; i < 3 ; i++) {
            a[i] = sc.nextInt();
        }
        Arrays.sort(a);
        System.out.println(a[1] - a[0] + a[2] - a[1]);
    }

} Main
import java.util.Arrays;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        @SuppressWarnings("resource")
        Scanner sc = new Scanner(System.in);
        int[] a = new int[3];
        for (int i = 0 ; i < 3 ; i++) {
            a[i] = sc.nextInt();
        }
        Arrays.sort(a);
        System.out.println(a[1] - a[0] + a[2] - a[1]);
    }

}