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

public 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();
        System.out.println(Math.max(Math.max(Math.abs(a-b), Math.abs(b-c)), Math.abs(a-c)));
    }
} import java.util.*; util.* java import java.lang.*; lang.* java public 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();
        System.out.println(Math.max(Math.max(Math.abs(a-b), Math.abs(b-c)), Math.abs(a-c)));
    }
} 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();
        System.out.println(Math.max(Math.max(Math.abs(a-b), Math.abs(b-c)), Math.abs(a-c)));
    } main {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();
        System.out.println(Math.max(Math.max(Math.abs(a-b), Math.abs(b-c)), Math.abs(a-c)));
    } 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 System.out.println(Math.max(Math.max(Math.abs(a-b), Math.abs(b-c)), Math.abs(a-c))) System.out.println System.out System System.out 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 String[] args args public 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();
        System.out.println(Math.max(Math.max(Math.abs(a-b), Math.abs(b-c)), Math.abs(a-c)));
    }
} public 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();
        System.out.println(Math.max(Math.max(Math.abs(a-b), Math.abs(b-c)), Math.abs(a-c)));
    }
} Main
import java.util.*;
import java.lang.*;

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