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];
    int max = 0;
    int min = 1000000000;

    for (int i = 0; i < n; i++) {
      a[i] = sc.nextInt();
    }

    for (int i = 0; i < n; i++) {
      max = Math.max(max,a[i]);
      min = Math.min(min,a[i]);
    }

    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[] a = new int[n];
    int max = 0;
    int min = 1000000000;

    for (int i = 0; i < n; i++) {
      a[i] = sc.nextInt();
    }

    for (int i = 0; i < n; i++) {
      max = Math.max(max,a[i]);
      min = Math.min(min,a[i]);
    }

    System.out.println(max-min);
  }
} Main public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int[] a = new int[n];
    int max = 0;
    int min = 1000000000;

    for (int i = 0; i < n; i++) {
      a[i] = sc.nextInt();
    }

    for (int i = 0; i < n; i++) {
      max = Math.max(max,a[i]);
      min = Math.min(min,a[i]);
    }

    System.out.println(max-min);
  } main {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int[] a = new int[n];
    int max = 0;
    int min = 1000000000;

    for (int i = 0; i < n; i++) {
      a[i] = sc.nextInt();
    }

    for (int i = 0; i < n; i++) {
      max = Math.max(max,a[i]);
      min = Math.min(min,a[i]);
    }

    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[] a = new int[n]; a new int[n] n int max = 0; max 0 int min = 1000000000; min 1000000000 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 for (int i = 0; i < n; i++) {
      max = Math.max(max,a[i]);
      min = Math.min(min,a[i]);
    } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
      max = Math.max(max,a[i]);
      min = Math.min(min,a[i]);
    } {
      max = Math.max(max,a[i]);
      min = Math.min(min,a[i]);
    } max = Math.max(max,a[i]) max Math.max(max,a[i]) Math.max Math max a[i] a i min = Math.min(min,a[i]) min Math.min(min,a[i]) Math.min Math min a[i] a i 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[] a = new int[n];
    int max = 0;
    int min = 1000000000;

    for (int i = 0; i < n; i++) {
      a[i] = sc.nextInt();
    }

    for (int i = 0; i < n; i++) {
      max = Math.max(max,a[i]);
      min = Math.min(min,a[i]);
    }

    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[] a = new int[n];
    int max = 0;
    int min = 1000000000;

    for (int i = 0; i < n; i++) {
      a[i] = sc.nextInt();
    }

    for (int i = 0; i < n; i++) {
      max = Math.max(max,a[i]);
      min = Math.min(min,a[i]);
    }

    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[] a = new int[n];
    int max = 0;
    int min = 1000000000;

    for (int i = 0; i < n; i++) {
      a[i] = sc.nextInt();
    }

    for (int i = 0; i < n; i++) {
      max = Math.max(max,a[i]);
      min = Math.min(min,a[i]);
    }

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