import java.util.*;
import java.lang.*;
import java.io.*;

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 sum = Math.abs(a-b) + Math.abs(b-c) + Math.abs(a-c);
        sum -= Math.max( Math.max( Math.abs(a-b), Math.abs(b-c)), Math.abs(a-c));

        System.out.println(sum);
    }
} import java.util.*; util.* java import java.lang.*; lang.* java import java.io.*; io.* 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 sum = Math.abs(a-b) + Math.abs(b-c) + Math.abs(a-c);
        sum -= Math.max( Math.max( Math.abs(a-b), Math.abs(b-c)), Math.abs(a-c));

        System.out.println(sum);
    }
} 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 sum = Math.abs(a-b) + Math.abs(b-c) + Math.abs(a-c);
        sum -= Math.max( Math.max( Math.abs(a-b), Math.abs(b-c)), Math.abs(a-c));

        System.out.println(sum);
    } main {
        Scanner sc = new Scanner(System.in);

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


        int sum = Math.abs(a-b) + Math.abs(b-c) + Math.abs(a-c);
        sum -= Math.max( Math.max( Math.abs(a-b), Math.abs(b-c)), Math.abs(a-c));

        System.out.println(sum);
    } 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 sum = Math.abs(a-b) + Math.abs(b-c) + Math.abs(a-c); sum Math.abs(a-b) + Math.abs(b-c) + Math.abs(a-c) Math.abs(a-b) + Math.abs(b-c) + Math.abs(a-c) Math.abs(a-b) Math.abs Math a-b a b Math.abs(b-c) Math.abs Math b-c b c Math.abs(a-c) Math.abs Math a-c a c sum -= Math.max( Math.max( Math.abs(a-b), Math.abs(b-c)), Math.abs(a-c)) sum Math.max( Math.max( Math.abs(a-b), Math.abs(b-c)), Math.abs(a-c)) Math.max Math Math.max( Math.abs(a-b), Math.abs(b-c)) Math.max Math Math.abs(a-b) Math.abs Math a-b a b Math.abs(b-c) Math.abs Math b-c b c Math.abs(a-c) Math.abs Math a-c a c System.out.println(sum) System.out.println System.out System System.out sum String[] args args
import java.util.*;
import java.lang.*;
import java.io.*;

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 sum = Math.abs(a-b) + Math.abs(b-c) + Math.abs(a-c);
        sum -= Math.max( Math.max( Math.abs(a-b), Math.abs(b-c)), Math.abs(a-c));

        System.out.println(sum);
    }
}