import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner sc  = new Scanner(System.in);
    int n = Integer.parseInt(sc.next());

    int[] a = new int[n];
    for(int i=0; i<n; i++){
      a[i] = Integer.parseInt(sc.next());
    }

    Arrays.sort(a);
    int ans = a[n-1]-a[0];
    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 n = Integer.parseInt(sc.next());

    int[] a = new int[n];
    for(int i=0; i<n; i++){
      a[i] = Integer.parseInt(sc.next());
    }

    Arrays.sort(a);
    int ans = a[n-1]-a[0];
    System.out.println(ans);
  }  
} Main public static void main(String[] args){
    Scanner sc  = new Scanner(System.in);
    int n = Integer.parseInt(sc.next());

    int[] a = new int[n];
    for(int i=0; i<n; i++){
      a[i] = Integer.parseInt(sc.next());
    }

    Arrays.sort(a);
    int ans = a[n-1]-a[0];
    System.out.println(ans);
  } main {
    Scanner sc  = new Scanner(System.in);
    int n = Integer.parseInt(sc.next());

    int[] a = new int[n];
    for(int i=0; i<n; i++){
      a[i] = Integer.parseInt(sc.next());
    }

    Arrays.sort(a);
    int ans = a[n-1]-a[0];
    System.out.println(ans);
  } Scanner sc  = new Scanner(System.in); sc new Scanner(System.in) int n = Integer.parseInt(sc.next()); n Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int[] a = new int[n]; a new int[n] n for(int i=0; i<n; i++){
      a[i] = Integer.parseInt(sc.next());
    } int i=0; int i=0; i 0 i<n i n i++ i++ i {
      a[i] = Integer.parseInt(sc.next());
    } {
      a[i] = Integer.parseInt(sc.next());
    } a[i] = Integer.parseInt(sc.next()) a[i] a i Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc Arrays.sort(a) Arrays.sort Arrays a int ans = a[n-1]-a[0]; ans a[n-1]-a[0] a[n-1] a n-1 n 1 a[0] a 0 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 n = Integer.parseInt(sc.next());

    int[] a = new int[n];
    for(int i=0; i<n; i++){
      a[i] = Integer.parseInt(sc.next());
    }

    Arrays.sort(a);
    int ans = a[n-1]-a[0];
    System.out.println(ans);
  }  
} public class Main{
  public static void main(String[] args){
    Scanner sc  = new Scanner(System.in);
    int n = Integer.parseInt(sc.next());

    int[] a = new int[n];
    for(int i=0; i<n; i++){
      a[i] = Integer.parseInt(sc.next());
    }

    Arrays.sort(a);
    int ans = a[n-1]-a[0];
    System.out.println(ans);
  }  
} Main
import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner sc  = new Scanner(System.in);
    int n = Integer.parseInt(sc.next());

    int[] a = new int[n];
    for(int i=0; i<n; i++){
      a[i] = Integer.parseInt(sc.next());
    }

    Arrays.sort(a);
    int ans = a[n-1]-a[0];
    System.out.println(ans);
  }  
}