import java.util.*;

class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int[] a = new int[n];
    int min = (int)Math.pow(10, 9);
    int max = 1;
    for (int i = 0; i < n; i++) {
      a[i] = sc.nextInt();
      if (a[i] < min) {
        min = a[i];
      }
      if (a[i] > max) {
        max = a[i];
      }
    }
    System.out.println(max - min);
  }
} import java.util.*; util.* java class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int[] a = new int[n];
    int min = (int)Math.pow(10, 9);
    int max = 1;
    for (int i = 0; i < n; i++) {
      a[i] = sc.nextInt();
      if (a[i] < min) {
        min = a[i];
      }
      if (a[i] > max) {
        max = 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 min = (int)Math.pow(10, 9);
    int max = 1;
    for (int i = 0; i < n; i++) {
      a[i] = sc.nextInt();
      if (a[i] < min) {
        min = a[i];
      }
      if (a[i] > max) {
        max = a[i];
      }
    }
    System.out.println(max - min);
  } main {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int[] a = new int[n];
    int min = (int)Math.pow(10, 9);
    int max = 1;
    for (int i = 0; i < n; i++) {
      a[i] = sc.nextInt();
      if (a[i] < min) {
        min = a[i];
      }
      if (a[i] > max) {
        max = 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 min = (int)Math.pow(10, 9); min (int)Math.pow(10, 9) Math.pow Math 10 9 int max = 1; max 1 for (int i = 0; i < n; i++) {
      a[i] = sc.nextInt();
      if (a[i] < min) {
        min = a[i];
      }
      if (a[i] > max) {
        max = a[i];
      }
    } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
      a[i] = sc.nextInt();
      if (a[i] < min) {
        min = a[i];
      }
      if (a[i] > max) {
        max = a[i];
      }
    } {
      a[i] = sc.nextInt();
      if (a[i] < min) {
        min = a[i];
      }
      if (a[i] > max) {
        max = a[i];
      }
    } a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc if (a[i] < min) {
        min = a[i];
      } a[i] < min a[i] a i min {
        min = a[i];
      } min = a[i] min a[i] a i if (a[i] > max) {
        max = a[i];
      } a[i] > max a[i] a i max {
        max = a[i];
      } max = a[i] max a[i] a i System.out.println(max - min) System.out.println System.out System System.out max - min max min String[] args args
import java.util.*;

class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int[] a = new int[n];
    int min = (int)Math.pow(10, 9);
    int max = 1;
    for (int i = 0; i < n; i++) {
      a[i] = sc.nextInt();
      if (a[i] < min) {
        min = a[i];
      }
      if (a[i] > max) {
        max = a[i];
      }
    }
    System.out.println(max - min);
  }
}