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

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int[] n = new int[3];
		for(int i = 0; i < 3; i++) {
			n[i] = sc.nextInt();
		}
		Arrays.sort(n);
		n[2] -= n[1];
		n[1] -= n[0];
		System.out.println(n[1]+n[2]);
	}
} 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[] n = new int[3];
		for(int i = 0; i < 3; i++) {
			n[i] = sc.nextInt();
		}
		Arrays.sort(n);
		n[2] -= n[1];
		n[1] -= n[0];
		System.out.println(n[1]+n[2]);
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int[] n = new int[3];
		for(int i = 0; i < 3; i++) {
			n[i] = sc.nextInt();
		}
		Arrays.sort(n);
		n[2] -= n[1];
		n[1] -= n[0];
		System.out.println(n[1]+n[2]);
	} main {
		Scanner sc = new Scanner(System.in);
		int[] n = new int[3];
		for(int i = 0; i < 3; i++) {
			n[i] = sc.nextInt();
		}
		Arrays.sort(n);
		n[2] -= n[1];
		n[1] -= n[0];
		System.out.println(n[1]+n[2]);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int[] n = new int[3]; n new int[3] 3 for(int i = 0; i < 3; i++) {
			n[i] = sc.nextInt();
		} int i = 0; int i = 0; i 0 i < 3 i 3 i++ i++ i {
			n[i] = sc.nextInt();
		} {
			n[i] = sc.nextInt();
		} n[i] = sc.nextInt() n[i] n i sc.nextInt() sc.nextInt sc Arrays.sort(n) Arrays.sort Arrays n n[2] -= n[1] n[2] n 2 n[1] n 1 n[1] -= n[0] n[1] n 1 n[0] n 0 System.out.println(n[1]+n[2]) System.out.println System.out System System.out n[1]+n[2] n[1] n 1 n[2] n 2 String[] args args public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int[] n = new int[3];
		for(int i = 0; i < 3; i++) {
			n[i] = sc.nextInt();
		}
		Arrays.sort(n);
		n[2] -= n[1];
		n[1] -= n[0];
		System.out.println(n[1]+n[2]);
	}
} public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int[] n = new int[3];
		for(int i = 0; i < 3; i++) {
			n[i] = sc.nextInt();
		}
		Arrays.sort(n);
		n[2] -= n[1];
		n[1] -= n[0];
		System.out.println(n[1]+n[2]);
	}
} 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[] n = new int[3];
		for(int i = 0; i < 3; i++) {
			n[i] = sc.nextInt();
		}
		Arrays.sort(n);
		n[2] -= n[1];
		n[1] -= n[0];
		System.out.println(n[1]+n[2]);
	}
}