import java.util.Arrays;
import java.util.Scanner;
public class Main{
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = Integer.parseInt(sc.next());
		int[] a = new int[n];
		for (int i= 0; i < n; i++) {
			a[i] =Integer.parseInt(sc.next());
		}
		Arrays.sort(a);
		int ans = a[n-1]-a[0];
		System.out.println(ans);
	}
} import java.util.Arrays; Arrays java.util import java.util.Scanner; Scanner java.util public class Main{
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = Integer.parseInt(sc.next());
		int[] a = new int[n];
		for (int i= 0; i < n; i++) {
			a[i] =Integer.parseInt(sc.next());
		}
		Arrays.sort(a);
		int ans = a[n-1]-a[0];
		System.out.println(ans);
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = Integer.parseInt(sc.next());
		int[] a = new int[n];
		for (int i= 0; i < n; i++) {
			a[i] =Integer.parseInt(sc.next());
		}
		Arrays.sort(a);
		int ans = a[n-1]-a[0];
		System.out.println(ans);
	} main {
		Scanner sc = new Scanner(System.in);
		int n = Integer.parseInt(sc.next());
		int[] a = new int[n];
		for (int i= 0; i < n; i++) {
			a[i] =Integer.parseInt(sc.next());
		}
		Arrays.sort(a);
		int ans = a[n-1]-a[0];
		System.out.println(ans);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = Integer.parseInt(sc.next()); n Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int[] a = new int[n]; a new int[n] n for (int i= 0; i < n; i++) {
			a[i] =Integer.parseInt(sc.next());
		} int i= 0; int i= 0; i 0 i < n i n i++ i++ i {
			a[i] =Integer.parseInt(sc.next());
		} {
			a[i] =Integer.parseInt(sc.next());
		} a[i] =Integer.parseInt(sc.next()) a[i] a i Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc Arrays.sort(a) Arrays.sort Arrays a int ans = a[n-1]-a[0]; ans a[n-1]-a[0] a[n-1] a n-1 n 1 a[0] a 0 System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main{
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = Integer.parseInt(sc.next());
		int[] a = new int[n];
		for (int i= 0; i < n; i++) {
			a[i] =Integer.parseInt(sc.next());
		}
		Arrays.sort(a);
		int ans = a[n-1]-a[0];
		System.out.println(ans);
	}
} public class Main{
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = Integer.parseInt(sc.next());
		int[] a = new int[n];
		for (int i= 0; i < n; i++) {
			a[i] =Integer.parseInt(sc.next());
		}
		Arrays.sort(a);
		int ans = a[n-1]-a[0];
		System.out.println(ans);
	}
} Main
import java.util.Arrays;
import java.util.Scanner;
public class Main{
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = Integer.parseInt(sc.next());
		int[] a = new int[n];
		for (int i= 0; i < n; i++) {
			a[i] =Integer.parseInt(sc.next());
		}
		Arrays.sort(a);
		int ans = a[n-1]-a[0];
		System.out.println(ans);
	}
}