import java.util.Scanner;

public class Main {
  public static void main (String[] args) {
    Scanner in = new Scanner(System.in);

    while (in.hasNext()){
      int N = in.nextInt();
      int min = Integer.MAX_VALUE;
      int max = Integer.MIN_VALUE;

      for (int i = 0; i < N; ++i) {
        int a = in.nextInt();
        min = Math.min(min, a);
        max = Math.max(max, a);
      }

      System.out.println(max - min);
    }
  }
} import java.util.Scanner; Scanner java.util public class Main {
  public static void main (String[] args) {
    Scanner in = new Scanner(System.in);

    while (in.hasNext()){
      int N = in.nextInt();
      int min = Integer.MAX_VALUE;
      int max = Integer.MIN_VALUE;

      for (int i = 0; i < N; ++i) {
        int a = in.nextInt();
        min = Math.min(min, a);
        max = Math.max(max, a);
      }

      System.out.println(max - min);
    }
  }
} Main public static void main (String[] args) {
    Scanner in = new Scanner(System.in);

    while (in.hasNext()){
      int N = in.nextInt();
      int min = Integer.MAX_VALUE;
      int max = Integer.MIN_VALUE;

      for (int i = 0; i < N; ++i) {
        int a = in.nextInt();
        min = Math.min(min, a);
        max = Math.max(max, a);
      }

      System.out.println(max - min);
    }
  } main {
    Scanner in = new Scanner(System.in);

    while (in.hasNext()){
      int N = in.nextInt();
      int min = Integer.MAX_VALUE;
      int max = Integer.MIN_VALUE;

      for (int i = 0; i < N; ++i) {
        int a = in.nextInt();
        min = Math.min(min, a);
        max = Math.max(max, a);
      }

      System.out.println(max - min);
    }
  } Scanner in = new Scanner(System.in); in new Scanner(System.in) while (in.hasNext()){
      int N = in.nextInt();
      int min = Integer.MAX_VALUE;
      int max = Integer.MIN_VALUE;

      for (int i = 0; i < N; ++i) {
        int a = in.nextInt();
        min = Math.min(min, a);
        max = Math.max(max, a);
      }

      System.out.println(max - min);
    } in.hasNext() in.hasNext in {
      int N = in.nextInt();
      int min = Integer.MAX_VALUE;
      int max = Integer.MIN_VALUE;

      for (int i = 0; i < N; ++i) {
        int a = in.nextInt();
        min = Math.min(min, a);
        max = Math.max(max, a);
      }

      System.out.println(max - min);
    } int N = in.nextInt(); N in.nextInt() in.nextInt in int min = Integer.MAX_VALUE; min Integer.MAX_VALUE Integer Integer.MAX_VALUE int max = Integer.MIN_VALUE; max Integer.MIN_VALUE Integer Integer.MIN_VALUE for (int i = 0; i < N; ++i) {
        int a = in.nextInt();
        min = Math.min(min, a);
        max = Math.max(max, a);
      } int i = 0; int i = 0; i 0 i < N i N ++i ++i i {
        int a = in.nextInt();
        min = Math.min(min, a);
        max = Math.max(max, a);
      } {
        int a = in.nextInt();
        min = Math.min(min, a);
        max = Math.max(max, a);
      } int a = in.nextInt(); a in.nextInt() in.nextInt in min = Math.min(min, a) min Math.min(min, a) Math.min Math min a max = Math.max(max, a) max Math.max(max, a) Math.max Math max 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 in = new Scanner(System.in);

    while (in.hasNext()){
      int N = in.nextInt();
      int min = Integer.MAX_VALUE;
      int max = Integer.MIN_VALUE;

      for (int i = 0; i < N; ++i) {
        int a = in.nextInt();
        min = Math.min(min, a);
        max = Math.max(max, a);
      }

      System.out.println(max - min);
    }
  }
} public class Main {
  public static void main (String[] args) {
    Scanner in = new Scanner(System.in);

    while (in.hasNext()){
      int N = in.nextInt();
      int min = Integer.MAX_VALUE;
      int max = Integer.MIN_VALUE;

      for (int i = 0; i < N; ++i) {
        int a = in.nextInt();
        min = Math.min(min, a);
        max = Math.max(max, a);
      }

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

public class Main {
  public static void main (String[] args) {
    Scanner in = new Scanner(System.in);

    while (in.hasNext()){
      int N = in.nextInt();
      int min = Integer.MAX_VALUE;
      int max = Integer.MIN_VALUE;

      for (int i = 0; i < N; ++i) {
        int a = in.nextInt();
        min = Math.min(min, a);
        max = Math.max(max, a);
      }

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