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 problem1=a[0]-a[1];
    int problem2=a[1]-a[2];

    int ans=Math.abs(problem1)+Math.abs(problem2);

    System.out.println(ans);
  }
} 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 problem1=a[0]-a[1];
    int problem2=a[1]-a[2];

    int ans=Math.abs(problem1)+Math.abs(problem2);

    System.out.println(ans);
  }
} 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 problem1=a[0]-a[1];
    int problem2=a[1]-a[2];

    int ans=Math.abs(problem1)+Math.abs(problem2);

    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 problem1=a[0]-a[1];
    int problem2=a[1]-a[2];

    int ans=Math.abs(problem1)+Math.abs(problem2);

    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 problem1=a[0]-a[1]; problem1 a[0]-a[1] a[0] a 0 a[1] a 1 int problem2=a[1]-a[2]; problem2 a[1]-a[2] a[1] a 1 a[2] a 2 int ans=Math.abs(problem1)+Math.abs(problem2); ans Math.abs(problem1)+Math.abs(problem2) Math.abs(problem1) Math.abs Math problem1 Math.abs(problem2) Math.abs Math problem2 System.out.println(ans) System.out.println System.out System System.out ans 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 problem1=a[0]-a[1];
    int problem2=a[1]-a[2];

    int ans=Math.abs(problem1)+Math.abs(problem2);

    System.out.println(ans);
  }
} 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 problem1=a[0]-a[1];
    int problem2=a[1]-a[2];

    int ans=Math.abs(problem1)+Math.abs(problem2);

    System.out.println(ans);
  }
} 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 problem1=a[0]-a[1];
    int problem2=a[1]-a[2];

    int ans=Math.abs(problem1)+Math.abs(problem2);

    System.out.println(ans);
  }
}
