import java.util.*;
public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int max = 0;
    int min = Integer.MAX_VALUE;
    for(int i = 0; i < n; i++){
      int tmp = sc.nextInt();
      max = Math.max(max, tmp);
      min = Math.min(min, tmp);
    }
    System.out.println(max - min);
  }
} 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 max = 0;
    int min = Integer.MAX_VALUE;
    for(int i = 0; i < n; i++){
      int tmp = sc.nextInt();
      max = Math.max(max, tmp);
      min = Math.min(min, tmp);
    }
    System.out.println(max - min);
  }
} Main public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int max = 0;
    int min = Integer.MAX_VALUE;
    for(int i = 0; i < n; i++){
      int tmp = sc.nextInt();
      max = Math.max(max, tmp);
      min = Math.min(min, tmp);
    }
    System.out.println(max - min);
  } main {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int max = 0;
    int min = Integer.MAX_VALUE;
    for(int i = 0; i < n; i++){
      int tmp = sc.nextInt();
      max = Math.max(max, tmp);
      min = Math.min(min, tmp);
    }
    System.out.println(max - min);
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int max = 0; max 0 int min = Integer.MAX_VALUE; min Integer.MAX_VALUE Integer Integer.MAX_VALUE for(int i = 0; i < n; i++){
      int tmp = sc.nextInt();
      max = Math.max(max, tmp);
      min = Math.min(min, tmp);
    } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
      int tmp = sc.nextInt();
      max = Math.max(max, tmp);
      min = Math.min(min, tmp);
    } {
      int tmp = sc.nextInt();
      max = Math.max(max, tmp);
      min = Math.min(min, tmp);
    } int tmp = sc.nextInt(); tmp sc.nextInt() sc.nextInt sc max = Math.max(max, tmp) max Math.max(max, tmp) Math.max Math max tmp min = Math.min(min, tmp) min Math.min(min, tmp) Math.min Math min tmp 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 n = sc.nextInt();
    int max = 0;
    int min = Integer.MAX_VALUE;
    for(int i = 0; i < n; i++){
      int tmp = sc.nextInt();
      max = Math.max(max, tmp);
      min = Math.min(min, tmp);
    }
    System.out.println(max - min);
  }
} public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int max = 0;
    int min = Integer.MAX_VALUE;
    for(int i = 0; i < n; i++){
      int tmp = sc.nextInt();
      max = Math.max(max, tmp);
      min = Math.min(min, tmp);
    }
    System.out.println(max - min);
  }
} Main
import java.util.*;
public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int max = 0;
    int min = Integer.MAX_VALUE;
    for(int i = 0; i < n; i++){
      int tmp = sc.nextInt();
      max = Math.max(max, tmp);
      min = Math.min(min, tmp);
    }
    System.out.println(max - min);
  }
}