import java.io.File;
import java.io.IOException;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Deque;
import java.util.Scanner;

public class Main {
 
	public static void main(String[] args) throws IOException {
		//File file = new File("input.txt");
		//Scanner sc = new Scanner(file);
		
		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);
		
		System.out.println(Math.abs(a[2]-a[1]) + Math.abs(a[1]-a[0]));
	}
} import java.io.File; File java.io import java.io.IOException; IOException java.io import java.util.ArrayDeque; ArrayDeque java.util import java.util.ArrayList; ArrayList java.util import java.util.Arrays; Arrays java.util import java.util.Deque; Deque java.util import java.util.Scanner; Scanner java.util public class Main {
 
	public static void main(String[] args) throws IOException {
		//File file = new File("input.txt");
		//Scanner sc = new Scanner(file);
		
		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);
		
		System.out.println(Math.abs(a[2]-a[1]) + Math.abs(a[1]-a[0]));
	}
} Main public static void main(String[] args) throws IOException {
		//File file = new File("input.txt");
		//Scanner sc = new Scanner(file);
		
		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);
		
		System.out.println(Math.abs(a[2]-a[1]) + Math.abs(a[1]-a[0]));
	} main {
		//File file = new File("input.txt");
		//Scanner sc = new Scanner(file);
		
		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);
		
		System.out.println(Math.abs(a[2]-a[1]) + Math.abs(a[1]-a[0]));
	} 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] a i sc.nextInt() sc.nextInt sc Arrays.sort(a) Arrays.sort Arrays a System.out.println(Math.abs(a[2]-a[1]) + Math.abs(a[1]-a[0])) System.out.println System.out System System.out Math.abs(a[2]-a[1]) + Math.abs(a[1]-a[0]) Math.abs(a[2]-a[1]) Math.abs Math a[2]-a[1] a[2] a 2 a[1] a 1 Math.abs(a[1]-a[0]) Math.abs Math a[1]-a[0] a[1] a 1 a[0] a 0 String[] args args public class Main {
 
	public static void main(String[] args) throws IOException {
		//File file = new File("input.txt");
		//Scanner sc = new Scanner(file);
		
		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);
		
		System.out.println(Math.abs(a[2]-a[1]) + Math.abs(a[1]-a[0]));
	}
} public class Main {
 
	public static void main(String[] args) throws IOException {
		//File file = new File("input.txt");
		//Scanner sc = new Scanner(file);
		
		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);
		
		System.out.println(Math.abs(a[2]-a[1]) + Math.abs(a[1]-a[0]));
	}
} Main
import java.io.File;
import java.io.IOException;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Deque;
import java.util.Scanner;

public class Main {
 
	public static void main(String[] args) throws IOException {
		//File file = new File("input.txt");
		//Scanner sc = new Scanner(file);
		
		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);
		
		System.out.println(Math.abs(a[2]-a[1]) + Math.abs(a[1]-a[0]));
	}
}