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

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

	int[] a = new int[3];
	for(int i = 0; i < 3; i++){
	    a[i] = scan.nextInt();
	}

	Arrays.sort(a);
	System.out.print(a[2]-a[0]);
    }
}
	 import java.util.Scanner; Scanner java.util import java.util.Arrays; Arrays java.util public class Main{
    public static void main(String[] args){
	Scanner scan = new Scanner(System.in);

	int[] a = new int[3];
	for(int i = 0; i < 3; i++){
	    a[i] = scan.nextInt();
	}

	Arrays.sort(a);
	System.out.print(a[2]-a[0]);
    }
} Main public static void main(String[] args){
	Scanner scan = new Scanner(System.in);

	int[] a = new int[3];
	for(int i = 0; i < 3; i++){
	    a[i] = scan.nextInt();
	}

	Arrays.sort(a);
	System.out.print(a[2]-a[0]);
    } main {
	Scanner scan = new Scanner(System.in);

	int[] a = new int[3];
	for(int i = 0; i < 3; i++){
	    a[i] = scan.nextInt();
	}

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

	int[] a = new int[3];
	for(int i = 0; i < 3; i++){
	    a[i] = scan.nextInt();
	}

	Arrays.sort(a);
	System.out.print(a[2]-a[0]);
    }
} public class Main{
    public static void main(String[] args){
	Scanner scan = new Scanner(System.in);

	int[] a = new int[3];
	for(int i = 0; i < 3; i++){
	    a[i] = scan.nextInt();
	}

	Arrays.sort(a);
	System.out.print(a[2]-a[0]);
    }
} Main
import java.util.Scanner;
import java.util.Arrays;

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

	int[] a = new int[3];
	for(int i = 0; i < 3; i++){
	    a[i] = scan.nextInt();
	}

	Arrays.sort(a);
	System.out.print(a[2]-a[0]);
    }
}
	
