import java.util.Arrays;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int[] a = new int[N];
		for (int i = 0; i < N; i++) {
			a[i] = sc.nextInt();	
		}
		Arrays.sort(a);
		System.out.println(a[N - 1] - a[0]);
		sc.close();
	}
} import java.util.Arrays; Arrays java.util import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int[] a = new int[N];
		for (int i = 0; i < N; i++) {
			a[i] = sc.nextInt();	
		}
		Arrays.sort(a);
		System.out.println(a[N - 1] - a[0]);
		sc.close();
	}
} Main public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int[] a = new int[N];
		for (int i = 0; i < N; i++) {
			a[i] = sc.nextInt();	
		}
		Arrays.sort(a);
		System.out.println(a[N - 1] - a[0]);
		sc.close();
	} main {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int[] a = new int[N];
		for (int i = 0; i < N; i++) {
			a[i] = sc.nextInt();	
		}
		Arrays.sort(a);
		System.out.println(a[N - 1] - a[0]);
		sc.close();
	} 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 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 Arrays.sort(a) Arrays.sort Arrays a System.out.println(a[N - 1] - a[0]) System.out.println System.out System System.out a[N - 1] - a[0] a[N - 1] a N - 1 N 1 a[0] a 0 sc.close() sc.close sc String[] args args public class Main {

	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int[] a = new int[N];
		for (int i = 0; i < N; i++) {
			a[i] = sc.nextInt();	
		}
		Arrays.sort(a);
		System.out.println(a[N - 1] - a[0]);
		sc.close();
	}
} public class Main {

	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int[] a = new int[N];
		for (int i = 0; i < N; i++) {
			a[i] = sc.nextInt();	
		}
		Arrays.sort(a);
		System.out.println(a[N - 1] - a[0]);
		sc.close();
	}
} Main
import java.util.Arrays;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int[] a = new int[N];
		for (int i = 0; i < N; i++) {
			a[i] = sc.nextInt();	
		}
		Arrays.sort(a);
		System.out.println(a[N - 1] - a[0]);
		sc.close();
	}
}