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

/** かかった時間:10分 */

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 < a.length; i++) {
			a[i] = sc.nextInt();
		}
		// ググった: Java sort https://www.sejuku.net/blog/14155
		Arrays.sort(a);
		int ans = a[2] - a[0];
		System.out.println(ans);
	}
} 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 < a.length; i++) {
			a[i] = sc.nextInt();
		}
		// ググった: Java sort https://www.sejuku.net/blog/14155
		Arrays.sort(a);
		int ans = a[2] - a[0];
		System.out.println(ans);
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a[] = new int[3];
		for (int i = 0; i < a.length; i++) {
			a[i] = sc.nextInt();
		}
		// ググった: Java sort https://www.sejuku.net/blog/14155
		Arrays.sort(a);
		int ans = a[2] - a[0];
		System.out.println(ans);
	} main {
		Scanner sc = new Scanner(System.in);
		int a[] = new int[3];
		for (int i = 0; i < a.length; i++) {
			a[i] = sc.nextInt();
		}
		// ググった: Java sort https://www.sejuku.net/blog/14155
		Arrays.sort(a);
		int ans = a[2] - a[0];
		System.out.println(ans);
	} 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 < a.length; i++) {
			a[i] = sc.nextInt();
		} int i = 0; int i = 0; i 0 i < a.length i a.length a a.length 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 ans = a[2] - a[0]; ans a[2] - a[0] a[2] a 2 a[0] a 0 System.out.println(ans) System.out.println System.out System System.out ans 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 < a.length; i++) {
			a[i] = sc.nextInt();
		}
		// ググった: Java sort https://www.sejuku.net/blog/14155
		Arrays.sort(a);
		int ans = a[2] - a[0];
		System.out.println(ans);
	}
} 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 < a.length; i++) {
			a[i] = sc.nextInt();
		}
		// ググった: Java sort https://www.sejuku.net/blog/14155
		Arrays.sort(a);
		int ans = a[2] - a[0];
		System.out.println(ans);
	}
} Main
import java.util.Arrays;
import java.util.Scanner;

/** かかった時間:10分 */

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 < a.length; i++) {
			a[i] = sc.nextInt();
		}
		// ググった: Java sort https://www.sejuku.net/blog/14155
		Arrays.sort(a);
		int ans = a[2] - a[0];
		System.out.println(ans);
	}
}