import java.util.Scanner;

public class Main{
public static void main(String[] args){
  Scanner sc = new Scanner(System.in);
int A1 = sc.nextInt();
int min=A1;
int max=A1;
  for(int i=0;i<2;i++){
    int A = sc.nextInt();
    if(A>max)
    max=A;
    if(A<min)
    min=A;
  }

System.out.println(max-min);
}
} import java.util.Scanner; Scanner java.util public class Main{
public static void main(String[] args){
  Scanner sc = new Scanner(System.in);
int A1 = sc.nextInt();
int min=A1;
int max=A1;
  for(int i=0;i<2;i++){
    int A = sc.nextInt();
    if(A>max)
    max=A;
    if(A<min)
    min=A;
  }

System.out.println(max-min);
}
} Main public static void main(String[] args){
  Scanner sc = new Scanner(System.in);
int A1 = sc.nextInt();
int min=A1;
int max=A1;
  for(int i=0;i<2;i++){
    int A = sc.nextInt();
    if(A>max)
    max=A;
    if(A<min)
    min=A;
  }

System.out.println(max-min);
} main {
  Scanner sc = new Scanner(System.in);
int A1 = sc.nextInt();
int min=A1;
int max=A1;
  for(int i=0;i<2;i++){
    int A = sc.nextInt();
    if(A>max)
    max=A;
    if(A<min)
    min=A;
  }

System.out.println(max-min);
} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int A1 = sc.nextInt(); A1 sc.nextInt() sc.nextInt sc int min=A1; min A1 int max=A1; max A1 for(int i=0;i<2;i++){
    int A = sc.nextInt();
    if(A>max)
    max=A;
    if(A<min)
    min=A;
  } int i=0; int i=0; i 0 i<2 i 2 i++ i++ i {
    int A = sc.nextInt();
    if(A>max)
    max=A;
    if(A<min)
    min=A;
  } {
    int A = sc.nextInt();
    if(A>max)
    max=A;
    if(A<min)
    min=A;
  } int A = sc.nextInt(); A sc.nextInt() sc.nextInt sc if(A>max)
    max=A; A>max A max max=A max A if(A<min)
    min=A; A<min A min min=A min A System.out.println(max-min) System.out.println System.out System System.out max-min max min String[] args args public class Main{
public static void main(String[] args){
  Scanner sc = new Scanner(System.in);
int A1 = sc.nextInt();
int min=A1;
int max=A1;
  for(int i=0;i<2;i++){
    int A = sc.nextInt();
    if(A>max)
    max=A;
    if(A<min)
    min=A;
  }

System.out.println(max-min);
}
} public class Main{
public static void main(String[] args){
  Scanner sc = new Scanner(System.in);
int A1 = sc.nextInt();
int min=A1;
int max=A1;
  for(int i=0;i<2;i++){
    int A = sc.nextInt();
    if(A>max)
    max=A;
    if(A<min)
    min=A;
  }

System.out.println(max-min);
}
} Main
import java.util.Scanner;

public class Main{
public static void main(String[] args){
  Scanner sc = new Scanner(System.in);
int A1 = sc.nextInt();
int min=A1;
int max=A1;
  for(int i=0;i<2;i++){
    int A = sc.nextInt();
    if(A>max)
    max=A;
    if(A<min)
    min=A;
  }

System.out.println(max-min);
}
}
