import java.util.*;
class Main
{
  public static void main (String[] args)
  {
    Scanner sc = new Scanner(System.in);
    int a = sc.nextInt();
    int b = sc.nextInt();
    int c = sc.nextInt();
    System.out.println(Math.min(Math.abs(a-b) + Math.abs(a-c),
                       Math.min(Math.abs(a-b) + Math.abs(b-c),
             			        Math.abs(b-c) + Math.abs(a-c))));
  }
} import java.util.*; util.* java class Main
{
  public static void main (String[] args)
  {
    Scanner sc = new Scanner(System.in);
    int a = sc.nextInt();
    int b = sc.nextInt();
    int c = sc.nextInt();
    System.out.println(Math.min(Math.abs(a-b) + Math.abs(a-c),
                       Math.min(Math.abs(a-b) + Math.abs(b-c),
             			        Math.abs(b-c) + Math.abs(a-c))));
  }
} Main public static void main (String[] args)
  {
    Scanner sc = new Scanner(System.in);
    int a = sc.nextInt();
    int b = sc.nextInt();
    int c = sc.nextInt();
    System.out.println(Math.min(Math.abs(a-b) + Math.abs(a-c),
                       Math.min(Math.abs(a-b) + Math.abs(b-c),
             			        Math.abs(b-c) + Math.abs(a-c))));
  } main {
    Scanner sc = new Scanner(System.in);
    int a = sc.nextInt();
    int b = sc.nextInt();
    int c = sc.nextInt();
    System.out.println(Math.min(Math.abs(a-b) + Math.abs(a-c),
                       Math.min(Math.abs(a-b) + Math.abs(b-c),
             			        Math.abs(b-c) + Math.abs(a-c))));
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc int b = sc.nextInt(); b sc.nextInt() sc.nextInt sc int c = sc.nextInt(); c sc.nextInt() sc.nextInt sc System.out.println(Math.min(Math.abs(a-b) + Math.abs(a-c),
                       Math.min(Math.abs(a-b) + Math.abs(b-c),
             			        Math.abs(b-c) + Math.abs(a-c)))) System.out.println System.out System System.out Math.min(Math.abs(a-b) + Math.abs(a-c),
                       Math.min(Math.abs(a-b) + Math.abs(b-c),
             			        Math.abs(b-c) + Math.abs(a-c))) Math.min Math Math.abs(a-b) + Math.abs(a-c) Math.abs(a-b) Math.abs Math a-b a b Math.abs(a-c) Math.abs Math a-c a c Math.min(Math.abs(a-b) + Math.abs(b-c),
             			        Math.abs(b-c) + Math.abs(a-c)) Math.min Math Math.abs(a-b) + Math.abs(b-c) Math.abs(a-b) Math.abs Math a-b a b Math.abs(b-c) Math.abs Math b-c b c Math.abs(b-c) + Math.abs(a-c) Math.abs(b-c) Math.abs Math b-c b c Math.abs(a-c) Math.abs Math a-c a c String[] args args
import java.util.*;
class Main
{
  public static void main (String[] args)
  {
    Scanner sc = new Scanner(System.in);
    int a = sc.nextInt();
    int b = sc.nextInt();
    int c = sc.nextInt();
    System.out.println(Math.min(Math.abs(a-b) + Math.abs(a-c),
                       Math.min(Math.abs(a-b) + Math.abs(b-c),
             			        Math.abs(b-c) + Math.abs(a-c))));
  }
}