import java.awt.Point;
import java.util.ArrayDeque;
import java.util.Scanner;
import java.util.*;
import java.util.Arrays;
import java.util.ArrayList;
import java.util.Set;
import java.util.HashSet;
import java.util.Collection;


 
public class Main{
	
        static final Scanner sc=new Scanner(System.in);
        
        
        
        
        
        
        public static void main(String[]args){
                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[1]-a[0])+Math.abs(a[2]-a[1]));
                
                
                


                
        }
        
        
        

		
	
} import java.awt.Point; Point java.awt import java.util.ArrayDeque; ArrayDeque java.util import java.util.Scanner; Scanner java.util import java.util.*; util.* java import java.util.Arrays; Arrays java.util import java.util.ArrayList; ArrayList java.util import java.util.Set; Set java.util import java.util.HashSet; HashSet java.util import java.util.Collection; Collection java.util public class Main{
	
        static final Scanner sc=new Scanner(System.in);
        
        
        
        
        
        
        public static void main(String[]args){
                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[1]-a[0])+Math.abs(a[2]-a[1]));
                
                
                


                
        }
        
        
        

		
	
} Main static final Scanner sc=new Scanner(System.in); sc new Scanner(System.in) public static void main(String[]args){
                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[1]-a[0])+Math.abs(a[2]-a[1]));
                
                
                


                
        } main {
                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[1]-a[0])+Math.abs(a[2]-a[1]));
                
                
                


                
        } 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]=sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc Arrays.sort(a) Arrays.sort Arrays a System.out.println(Math.abs(a[1]-a[0])+Math.abs(a[2]-a[1])) System.out.println System.out System System.out Math.abs(a[1]-a[0])+Math.abs(a[2]-a[1]) Math.abs(a[1]-a[0]) Math.abs Math a[1]-a[0] a[1] a 1 a[0] a 0 Math.abs(a[2]-a[1]) Math.abs Math a[2]-a[1] a[2] a 2 a[1] a 1 String[]args args public class Main{
	
        static final Scanner sc=new Scanner(System.in);
        
        
        
        
        
        
        public static void main(String[]args){
                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[1]-a[0])+Math.abs(a[2]-a[1]));
                
                
                


                
        }
        
        
        

		
	
} public class Main{
	
        static final Scanner sc=new Scanner(System.in);
        
        
        
        
        
        
        public static void main(String[]args){
                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[1]-a[0])+Math.abs(a[2]-a[1]));
                
                
                


                
        }
        
        
        

		
	
} Main
import java.awt.Point;
import java.util.ArrayDeque;
import java.util.Scanner;
import java.util.*;
import java.util.Arrays;
import java.util.ArrayList;
import java.util.Set;
import java.util.HashSet;
import java.util.Collection;


 
public class Main{
	
        static final Scanner sc=new Scanner(System.in);
        
        
        
        
        
        
        public static void main(String[]args){
                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[1]-a[0])+Math.abs(a[2]-a[1]));
                
                
                


                
        }
        
        
        

		
	
}
