import java.util.*;
public class Main{
  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 dis = 0;
    for(int i = 0;i<2;i++){
      dis += a[i+1] - a[i];
    }
    System.out.println(dis);
  }
} import java.util.*; util.* java public class Main{
  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 dis = 0;
    for(int i = 0;i<2;i++){
      dis += a[i+1] - a[i];
    }
    System.out.println(dis);
  }
} Main 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 dis = 0;
    for(int i = 0;i<2;i++){
      dis += a[i+1] - a[i];
    }
    System.out.println(dis);
  } 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 dis = 0;
    for(int i = 0;i<2;i++){
      dis += a[i+1] - a[i];
    }
    System.out.println(dis);
  } 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 dis = 0; dis 0 for(int i = 0;i<2;i++){
      dis += a[i+1] - a[i];
    } int i = 0; int i = 0; i 0 i<2 i 2 i++ i++ i {
      dis += a[i+1] - a[i];
    } {
      dis += a[i+1] - a[i];
    } dis += a[i+1] - a[i] dis a[i+1] - a[i] a[i+1] a i+1 i 1 a[i] a i System.out.println(dis) System.out.println System.out System System.out dis String[] args args public class Main{
  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 dis = 0;
    for(int i = 0;i<2;i++){
      dis += a[i+1] - a[i];
    }
    System.out.println(dis);
  }
} public class Main{
  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 dis = 0;
    for(int i = 0;i<2;i++){
      dis += a[i+1] - a[i];
    }
    System.out.println(dis);
  }
} Main
import java.util.*;
public class Main{
  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 dis = 0;
    for(int i = 0;i<2;i++){
      dis += a[i+1] - a[i];
    }
    System.out.println(dis);
  }
}
