import java.util.*;

class Main{

	public static void main(String[] args){
	
		Scanner sc = new Scanner(System.in);

		int max = 0;
		int min = 100;

		for(int i = 0; i<3; i++){
			int A = sc.nextInt();
			max = Math.max(max,A);
			min = Math.min(min,A);
		}
			System.out.println(max - min);
	}
} import java.util.*; util.* java class Main{

	public static void main(String[] args){
	
		Scanner sc = new Scanner(System.in);

		int max = 0;
		int min = 100;

		for(int i = 0; i<3; i++){
			int A = sc.nextInt();
			max = Math.max(max,A);
			min = Math.min(min,A);
		}
			System.out.println(max - min);
	}
} Main public static void main(String[] args){
	
		Scanner sc = new Scanner(System.in);

		int max = 0;
		int min = 100;

		for(int i = 0; i<3; i++){
			int A = sc.nextInt();
			max = Math.max(max,A);
			min = Math.min(min,A);
		}
			System.out.println(max - min);
	} main {
	
		Scanner sc = new Scanner(System.in);

		int max = 0;
		int min = 100;

		for(int i = 0; i<3; i++){
			int A = sc.nextInt();
			max = Math.max(max,A);
			min = Math.min(min,A);
		}
			System.out.println(max - min);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int max = 0; max 0 int min = 100; min 100 for(int i = 0; i<3; i++){
			int A = sc.nextInt();
			max = Math.max(max,A);
			min = Math.min(min,A);
		} int i = 0; int i = 0; i 0 i<3 i 3 i++ i++ i {
			int A = sc.nextInt();
			max = Math.max(max,A);
			min = Math.min(min,A);
		} {
			int A = sc.nextInt();
			max = Math.max(max,A);
			min = Math.min(min,A);
		} int A = sc.nextInt(); A sc.nextInt() sc.nextInt sc max = Math.max(max,A) max Math.max(max,A) Math.max Math max A min = Math.min(min,A) min Math.min(min,A) Math.min Math min A System.out.println(max - min) System.out.println System.out System System.out max - min max min String[] args args
import java.util.*;

class Main{

	public static void main(String[] args){
	
		Scanner sc = new Scanner(System.in);

		int max = 0;
		int min = 100;

		for(int i = 0; i<3; i++){
			int A = sc.nextInt();
			max = Math.max(max,A);
			min = Math.min(min,A);
		}
			System.out.println(max - min);
	}
}