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

public class Main {

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

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

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

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

public class Main {

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