import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
    
		// 整数の入力
        List<Integer> list = Arrays.asList(sc.nextInt(), sc.nextInt(), sc.nextInt());
        Collections.sort(list);
        System.out.println(list.get(2) - list.get(0));
	}
} import java.util.*; util.* java public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
    
		// 整数の入力
        List<Integer> list = Arrays.asList(sc.nextInt(), sc.nextInt(), sc.nextInt());
        Collections.sort(list);
        System.out.println(list.get(2) - list.get(0));
	}
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
    
		// 整数の入力
        List<Integer> list = Arrays.asList(sc.nextInt(), sc.nextInt(), sc.nextInt());
        Collections.sort(list);
        System.out.println(list.get(2) - list.get(0));
	} main {
		Scanner sc = new Scanner(System.in);
    
		// 整数の入力
        List<Integer> list = Arrays.asList(sc.nextInt(), sc.nextInt(), sc.nextInt());
        Collections.sort(list);
        System.out.println(list.get(2) - list.get(0));
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) List<Integer> list = Arrays.asList(sc.nextInt(), sc.nextInt(), sc.nextInt()); list Arrays.asList(sc.nextInt(), sc.nextInt(), sc.nextInt()) Arrays.asList Arrays sc.nextInt() sc.nextInt sc sc.nextInt() sc.nextInt sc sc.nextInt() sc.nextInt sc Collections.sort(list) Collections.sort Collections list System.out.println(list.get(2) - list.get(0)) System.out.println System.out System System.out list.get(2) - list.get(0) list.get(2) list.get list 2 list.get(0) list.get list 0 String[] args args public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
    
		// 整数の入力
        List<Integer> list = Arrays.asList(sc.nextInt(), sc.nextInt(), sc.nextInt());
        Collections.sort(list);
        System.out.println(list.get(2) - list.get(0));
	}
} public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
    
		// 整数の入力
        List<Integer> list = Arrays.asList(sc.nextInt(), sc.nextInt(), sc.nextInt());
        Collections.sort(list);
        System.out.println(list.get(2) - list.get(0));
	}
} Main
import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
    
		// 整数の入力
        List<Integer> list = Arrays.asList(sc.nextInt(), sc.nextInt(), sc.nextInt());
        Collections.sort(list);
        System.out.println(list.get(2) - list.get(0));
	}
}
