import java.util.Scanner;

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();

		if (Math.abs(a-b) >= Math.abs(a-c) && Math.abs(a-b) >= Math.abs(b-c)) {
			System.out.print(Math.abs(a-c) + Math.abs(b-c));
		} else if (Math.abs(b-c) >= Math.abs(a-b) && Math.abs(b-c) >= Math.abs(a-c)) {
			System.out.print(Math.abs(a-c) + Math.abs(a-b));
		}else {
			System.out.print(Math.abs(a-b) + Math.abs(b-c));
		}
	}
} import java.util.Scanner; Scanner java.util 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();

		if (Math.abs(a-b) >= Math.abs(a-c) && Math.abs(a-b) >= Math.abs(b-c)) {
			System.out.print(Math.abs(a-c) + Math.abs(b-c));
		} else if (Math.abs(b-c) >= Math.abs(a-b) && Math.abs(b-c) >= Math.abs(a-c)) {
			System.out.print(Math.abs(a-c) + Math.abs(a-b));
		}else {
			System.out.print(Math.abs(a-b) + Math.abs(b-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();

		if (Math.abs(a-b) >= Math.abs(a-c) && Math.abs(a-b) >= Math.abs(b-c)) {
			System.out.print(Math.abs(a-c) + Math.abs(b-c));
		} else if (Math.abs(b-c) >= Math.abs(a-b) && Math.abs(b-c) >= Math.abs(a-c)) {
			System.out.print(Math.abs(a-c) + Math.abs(a-b));
		}else {
			System.out.print(Math.abs(a-b) + Math.abs(b-c));
		}
	} main {

		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();

		if (Math.abs(a-b) >= Math.abs(a-c) && Math.abs(a-b) >= Math.abs(b-c)) {
			System.out.print(Math.abs(a-c) + Math.abs(b-c));
		} else if (Math.abs(b-c) >= Math.abs(a-b) && Math.abs(b-c) >= Math.abs(a-c)) {
			System.out.print(Math.abs(a-c) + Math.abs(a-b));
		}else {
			System.out.print(Math.abs(a-b) + Math.abs(b-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 if (Math.abs(a-b) >= Math.abs(a-c) && Math.abs(a-b) >= Math.abs(b-c)) {
			System.out.print(Math.abs(a-c) + Math.abs(b-c));
		} else if (Math.abs(b-c) >= Math.abs(a-b) && Math.abs(b-c) >= Math.abs(a-c)) {
			System.out.print(Math.abs(a-c) + Math.abs(a-b));
		}else {
			System.out.print(Math.abs(a-b) + Math.abs(b-c));
		} Math.abs(a-b) >= Math.abs(a-c) && Math.abs(a-b) >= Math.abs(b-c) Math.abs(a-b) >= Math.abs(a-c) Math.abs(a-b) Math.abs Math a-b a b Math.abs(a-c) Math.abs Math a-c a c Math.abs(a-b) >= Math.abs(b-c) Math.abs(a-b) Math.abs Math a-b a b Math.abs(b-c) Math.abs Math b-c b c {
			System.out.print(Math.abs(a-c) + Math.abs(b-c));
		} System.out.print(Math.abs(a-c) + Math.abs(b-c)) System.out.print System.out System System.out Math.abs(a-c) + Math.abs(b-c) Math.abs(a-c) Math.abs Math a-c a c Math.abs(b-c) Math.abs Math b-c b c if (Math.abs(b-c) >= Math.abs(a-b) && Math.abs(b-c) >= Math.abs(a-c)) {
			System.out.print(Math.abs(a-c) + Math.abs(a-b));
		}else {
			System.out.print(Math.abs(a-b) + Math.abs(b-c));
		} Math.abs(b-c) >= Math.abs(a-b) && Math.abs(b-c) >= Math.abs(a-c) Math.abs(b-c) >= Math.abs(a-b) Math.abs(b-c) Math.abs Math b-c b c Math.abs(a-b) Math.abs Math a-b a b Math.abs(b-c) >= Math.abs(a-c) Math.abs(b-c) Math.abs Math b-c b c Math.abs(a-c) Math.abs Math a-c a c {
			System.out.print(Math.abs(a-c) + Math.abs(a-b));
		} System.out.print(Math.abs(a-c) + Math.abs(a-b)) System.out.print System.out System System.out Math.abs(a-c) + Math.abs(a-b) Math.abs(a-c) Math.abs Math a-c a c Math.abs(a-b) Math.abs Math a-b a b {
			System.out.print(Math.abs(a-b) + Math.abs(b-c));
		} System.out.print(Math.abs(a-b) + Math.abs(b-c)) System.out.print System.out System System.out Math.abs(a-b) + Math.abs(b-c) Math.abs(a-b) Math.abs Math a-b a b Math.abs(b-c) Math.abs Math b-c b 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();

		if (Math.abs(a-b) >= Math.abs(a-c) && Math.abs(a-b) >= Math.abs(b-c)) {
			System.out.print(Math.abs(a-c) + Math.abs(b-c));
		} else if (Math.abs(b-c) >= Math.abs(a-b) && Math.abs(b-c) >= Math.abs(a-c)) {
			System.out.print(Math.abs(a-c) + Math.abs(a-b));
		}else {
			System.out.print(Math.abs(a-b) + Math.abs(b-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();

		if (Math.abs(a-b) >= Math.abs(a-c) && Math.abs(a-b) >= Math.abs(b-c)) {
			System.out.print(Math.abs(a-c) + Math.abs(b-c));
		} else if (Math.abs(b-c) >= Math.abs(a-b) && Math.abs(b-c) >= Math.abs(a-c)) {
			System.out.print(Math.abs(a-c) + Math.abs(a-b));
		}else {
			System.out.print(Math.abs(a-b) + Math.abs(b-c));
		}
	}
} Main
import java.util.Scanner;

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();

		if (Math.abs(a-b) >= Math.abs(a-c) && Math.abs(a-b) >= Math.abs(b-c)) {
			System.out.print(Math.abs(a-c) + Math.abs(b-c));
		} else if (Math.abs(b-c) >= Math.abs(a-b) && Math.abs(b-c) >= Math.abs(a-c)) {
			System.out.print(Math.abs(a-c) + Math.abs(a-b));
		}else {
			System.out.print(Math.abs(a-b) + Math.abs(b-c));
		}
	}
}