import java.util.*;


class Main{
  
      public static Long gcd(Long num1,Long num2) {
        if(num2==0) return num1;
        else return gcd(num2,num1%num2);
    }
  
  
	public static void main(String[] args) {
    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);
      
      int ans = a[1] - a[0] + a[2] - a[1];
      System.out.println(ans);
	}
} import java.util.*; util.* java class Main{
  
      public static Long gcd(Long num1,Long num2) {
        if(num2==0) return num1;
        else return gcd(num2,num1%num2);
    }
  
  
	public static void main(String[] args) {
    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);
      
      int ans = a[1] - a[0] + a[2] - a[1];
      System.out.println(ans);
	}
} Main public static Long gcd(Long num1,Long num2) {
        if(num2==0) return num1;
        else return gcd(num2,num1%num2);
    } gcd {
        if(num2==0) return num1;
        else return gcd(num2,num1%num2);
    } if(num2==0) return num1;
        else return gcd(num2,num1%num2); num2==0 num2 0 return num1; num1 return gcd(num2,num1%num2); gcd(num2,num1%num2) gcd num2 num1%num2 num1 num2 Long num1 num1 Long num2 num2 public static void main(String[] args) {
    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);
      
      int ans = a[1] - a[0] + a[2] - a[1];
      System.out.println(ans);
	} main {
    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);
      
      int ans = a[1] - a[0] + a[2] - a[1];
      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<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 int ans = a[1] - a[0] + a[2] - a[1]; ans a[1] - a[0] + a[2] - a[1] a[1] - a[0] + a[2] a[1] - a[0] a[1] a 1 a[0] a 0 a[2] a 2 a[1] a 1 System.out.println(ans) System.out.println System.out System System.out ans String[] args args
import java.util.*;


class Main{
  
      public static Long gcd(Long num1,Long num2) {
        if(num2==0) return num1;
        else return gcd(num2,num1%num2);
    }
  
  
	public static void main(String[] args) {
    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);
      
      int ans = a[1] - a[0] + a[2] - a[1];
      System.out.println(ans);
	}
}
