import java.util.*;

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