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

public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int[] a = new int[3];
		for (int i=0; i<3; i++){
			a[i] = sc.nextInt();
		}
		Arrays.sort(a);
		int totalcost = 0;
		for (int i=1; i<3; i++){
			totalcost += a[i] - a[i-1];
		}
		System.out.println(totalcost);
	}
} import java.util.Arrays; Arrays java.util import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int[] a = new int[3];
		for (int i=0; i<3; i++){
			a[i] = sc.nextInt();
		}
		Arrays.sort(a);
		int totalcost = 0;
		for (int i=1; i<3; i++){
			totalcost += a[i] - a[i-1];
		}
		System.out.println(totalcost);
	}
} Main public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int[] a = new int[3];
		for (int i=0; i<3; i++){
			a[i] = sc.nextInt();
		}
		Arrays.sort(a);
		int totalcost = 0;
		for (int i=1; i<3; i++){
			totalcost += a[i] - a[i-1];
		}
		System.out.println(totalcost);
	} main {

		Scanner sc = new Scanner(System.in);

		int[] a = new int[3];
		for (int i=0; i<3; i++){
			a[i] = sc.nextInt();
		}
		Arrays.sort(a);
		int totalcost = 0;
		for (int i=1; i<3; i++){
			totalcost += a[i] - a[i-1];
		}
		System.out.println(totalcost);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int[] a = new int[3]; a new int[3] 3 for (int i=0; i<3; i++){
			a[i] = sc.nextInt();
		} int i=0; int i=0; i 0 i<3 i 3 i++ i++ i {
			a[i] = sc.nextInt();
		} {
			a[i] = sc.nextInt();
		} a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc Arrays.sort(a) Arrays.sort Arrays a int totalcost = 0; totalcost 0 for (int i=1; i<3; i++){
			totalcost += a[i] - a[i-1];
		} int i=1; int i=1; i 1 i<3 i 3 i++ i++ i {
			totalcost += a[i] - a[i-1];
		} {
			totalcost += a[i] - a[i-1];
		} totalcost += a[i] - a[i-1] totalcost a[i] - a[i-1] a[i] a i a[i-1] a i-1 i 1 System.out.println(totalcost) System.out.println System.out System System.out totalcost String[] args args public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int[] a = new int[3];
		for (int i=0; i<3; i++){
			a[i] = sc.nextInt();
		}
		Arrays.sort(a);
		int totalcost = 0;
		for (int i=1; i<3; i++){
			totalcost += a[i] - a[i-1];
		}
		System.out.println(totalcost);
	}
} public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int[] a = new int[3];
		for (int i=0; i<3; i++){
			a[i] = sc.nextInt();
		}
		Arrays.sort(a);
		int totalcost = 0;
		for (int i=1; i<3; i++){
			totalcost += a[i] - a[i-1];
		}
		System.out.println(totalcost);
	}
} Main
import java.util.Arrays;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int[] a = new int[3];
		for (int i=0; i<3; i++){
			a[i] = sc.nextInt();
		}
		Arrays.sort(a);
		int totalcost = 0;
		for (int i=1; i<3; i++){
			totalcost += a[i] - a[i-1];
		}
		System.out.println(totalcost);
	}
}