import java.util.Arrays;
import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		Scanner scan=new Scanner(System.in);
		int a[]=new int[3];
		a[0]=scan.nextInt();
		a[1]=scan.nextInt();
		a[2]=scan.nextInt();
	Arrays.sort(a);
		System.out.println(a[2]-a[1]+(a[1]-a[0]));
		}
} import java.util.Arrays; Arrays java.util import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args) {
		Scanner scan=new Scanner(System.in);
		int a[]=new int[3];
		a[0]=scan.nextInt();
		a[1]=scan.nextInt();
		a[2]=scan.nextInt();
	Arrays.sort(a);
		System.out.println(a[2]-a[1]+(a[1]-a[0]));
		}
} Main public static void main(String[] args) {
		Scanner scan=new Scanner(System.in);
		int a[]=new int[3];
		a[0]=scan.nextInt();
		a[1]=scan.nextInt();
		a[2]=scan.nextInt();
	Arrays.sort(a);
		System.out.println(a[2]-a[1]+(a[1]-a[0]));
		} main {
		Scanner scan=new Scanner(System.in);
		int a[]=new int[3];
		a[0]=scan.nextInt();
		a[1]=scan.nextInt();
		a[2]=scan.nextInt();
	Arrays.sort(a);
		System.out.println(a[2]-a[1]+(a[1]-a[0]));
		} Scanner scan=new Scanner(System.in); scan new Scanner(System.in) int a[]=new int[3]; a new int[3] 3 a[0]=scan.nextInt() a[0] a 0 scan.nextInt() scan.nextInt scan a[1]=scan.nextInt() a[1] a 1 scan.nextInt() scan.nextInt scan a[2]=scan.nextInt() a[2] a 2 scan.nextInt() scan.nextInt scan Arrays.sort(a) Arrays.sort Arrays a System.out.println(a[2]-a[1]+(a[1]-a[0])) System.out.println System.out System System.out a[2]-a[1]+(a[1]-a[0]) a[2]-a[1] a[2] a 2 a[1] a 1 (a[1]-a[0]) a[1] a 1 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];
		a[0]=scan.nextInt();
		a[1]=scan.nextInt();
		a[2]=scan.nextInt();
	Arrays.sort(a);
		System.out.println(a[2]-a[1]+(a[1]-a[0]));
		}
} public class Main {
	public static void main(String[] args) {
		Scanner scan=new Scanner(System.in);
		int a[]=new int[3];
		a[0]=scan.nextInt();
		a[1]=scan.nextInt();
		a[2]=scan.nextInt();
	Arrays.sort(a);
		System.out.println(a[2]-a[1]+(a[1]-a[0]));
		}
} Main
import java.util.Arrays;
import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		Scanner scan=new Scanner(System.in);
		int a[]=new int[3];
		a[0]=scan.nextInt();
		a[1]=scan.nextInt();
		a[2]=scan.nextInt();
	Arrays.sort(a);
		System.out.println(a[2]-a[1]+(a[1]-a[0]));
		}
}