import java.util.*;
public class Main {
    public static void main(String[] args){
    
    Scanner sc = new Scanner(System.in);
    
      int n = sc.nextInt();
      int[] a = new int[n];
      
      for(int i=0;i<n;i++){
      	a[i] = sc.nextInt();
      }
      
      Arrays.sort(a);
      
    System.out.println(a[n-1] -  a[0]);
      
}
} import java.util.*; util.* java public class Main {
    public static void main(String[] args){
    
    Scanner sc = new Scanner(System.in);
    
      int n = sc.nextInt();
      int[] a = new int[n];
      
      for(int i=0;i<n;i++){
      	a[i] = sc.nextInt();
      }
      
      Arrays.sort(a);
      
    System.out.println(a[n-1] -  a[0]);
      
}
} Main public static void main(String[] args){
    
    Scanner sc = new Scanner(System.in);
    
      int n = sc.nextInt();
      int[] a = new int[n];
      
      for(int i=0;i<n;i++){
      	a[i] = sc.nextInt();
      }
      
      Arrays.sort(a);
      
    System.out.println(a[n-1] -  a[0]);
      
} main {
    
    Scanner sc = new Scanner(System.in);
    
      int n = sc.nextInt();
      int[] a = new int[n];
      
      for(int i=0;i<n;i++){
      	a[i] = sc.nextInt();
      }
      
      Arrays.sort(a);
      
    System.out.println(a[n-1] -  a[0]);
      
} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int[] a = new int[n]; a new int[n] n for(int i=0;i<n;i++){
      	a[i] = sc.nextInt();
      } int i=0; int i=0; i 0 i<n i n 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 System.out.println(a[n-1] -  a[0]) System.out.println System.out System System.out a[n-1] -  a[0] a[n-1] a n-1 n 1 a[0] a 0 String[] args args public class Main {
    public static void main(String[] args){
    
    Scanner sc = new Scanner(System.in);
    
      int n = sc.nextInt();
      int[] a = new int[n];
      
      for(int i=0;i<n;i++){
      	a[i] = sc.nextInt();
      }
      
      Arrays.sort(a);
      
    System.out.println(a[n-1] -  a[0]);
      
}
} public class Main {
    public static void main(String[] args){
    
    Scanner sc = new Scanner(System.in);
    
      int n = sc.nextInt();
      int[] a = new int[n];
      
      for(int i=0;i<n;i++){
      	a[i] = sc.nextInt();
      }
      
      Arrays.sort(a);
      
    System.out.println(a[n-1] -  a[0]);
      
}
} Main
import java.util.*;
public class Main {
    public static void main(String[] args){
    
    Scanner sc = new Scanner(System.in);
    
      int n = sc.nextInt();
      int[] a = new int[n];
      
      for(int i=0;i<n;i++){
      	a[i] = sc.nextInt();
      }
      
      Arrays.sort(a);
      
    System.out.println(a[n-1] -  a[0]);
      
}
}
