import java.util.*;

class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();

        int[] ans = {Math.abs(a - b), Math.abs(b - c), Math.abs(c - a)};
        Arrays.sort(ans);

        System.out.println(ans[0] + ans[1]);
   }
} import java.util.*; util.* java class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();

        int[] ans = {Math.abs(a - b), Math.abs(b - c), Math.abs(c - a)};
        Arrays.sort(ans);

        System.out.println(ans[0] + ans[1]);
   }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();

        int[] ans = {Math.abs(a - b), Math.abs(b - c), Math.abs(c - a)};
        Arrays.sort(ans);

        System.out.println(ans[0] + ans[1]);
   } main {
        Scanner sc = new Scanner(System.in);

        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();

        int[] ans = {Math.abs(a - b), Math.abs(b - c), Math.abs(c - a)};
        Arrays.sort(ans);

        System.out.println(ans[0] + ans[1]);
   } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc int b = sc.nextInt(); b sc.nextInt() sc.nextInt sc int c = sc.nextInt(); c sc.nextInt() sc.nextInt sc int[] ans = {Math.abs(a - b), Math.abs(b - c), Math.abs(c - a)}; ans {Math.abs(a - b), Math.abs(b - c), Math.abs(c - a)} Math.abs(a - b) Math.abs Math a - b a b Math.abs(b - c) Math.abs Math b - c b c Math.abs(c - a) Math.abs Math c - a c a Arrays.sort(ans) Arrays.sort Arrays ans System.out.println(ans[0] + ans[1]) System.out.println System.out System System.out ans[0] + ans[1] ans[0] ans 0 ans[1] ans 1 String[] args args
import java.util.*;

class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();

        int[] ans = {Math.abs(a - b), Math.abs(b - c), Math.abs(c - a)};
        Arrays.sort(ans);

        System.out.println(ans[0] + ans[1]);
   }
}