import java.util.Scanner;


public class Main {

	public static void main(String args[]) {

		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();
		int a = 0;
		int max = 0;
		int min = 1000000001;

		for (int i = 0; i < n; i++) {

			a = sc.nextInt();

			if (max < a) {
				max = a;
			}

			if (min > a) {
				min = a;
			}
		}

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

	public static void main(String args[]) {

		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();
		int a = 0;
		int max = 0;
		int min = 1000000001;

		for (int i = 0; i < n; i++) {

			a = sc.nextInt();

			if (max < a) {
				max = a;
			}

			if (min > a) {
				min = a;
			}
		}

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

		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();
		int a = 0;
		int max = 0;
		int min = 1000000001;

		for (int i = 0; i < n; i++) {

			a = sc.nextInt();

			if (max < a) {
				max = a;
			}

			if (min > a) {
				min = a;
			}
		}

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

		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();
		int a = 0;
		int max = 0;
		int min = 1000000001;

		for (int i = 0; i < n; i++) {

			a = sc.nextInt();

			if (max < a) {
				max = a;
			}

			if (min > a) {
				min = a;
			}
		}

		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 = 0; a 0 int max = 0; max 0 int min = 1000000001; min 1000000001 for (int i = 0; i < n; i++) {

			a = sc.nextInt();

			if (max < a) {
				max = a;
			}

			if (min > a) {
				min = a;
			}
		} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {

			a = sc.nextInt();

			if (max < a) {
				max = a;
			}

			if (min > a) {
				min = a;
			}
		} {

			a = sc.nextInt();

			if (max < a) {
				max = a;
			}

			if (min > a) {
				min = a;
			}
		} a = sc.nextInt() a sc.nextInt() sc.nextInt sc if (max < a) {
				max = a;
			} max < a max a {
				max = a;
			} max = a max a if (min > a) {
				min = a;
			} min > a min a {
				min = a;
			} min = a min 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 sc = new Scanner(System.in);

		int n = sc.nextInt();
		int a = 0;
		int max = 0;
		int min = 1000000001;

		for (int i = 0; i < n; i++) {

			a = sc.nextInt();

			if (max < a) {
				max = a;
			}

			if (min > a) {
				min = a;
			}
		}

		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 = 0;
		int max = 0;
		int min = 1000000001;

		for (int i = 0; i < n; i++) {

			a = sc.nextInt();

			if (max < a) {
				max = a;
			}

			if (min > a) {
				min = a;
			}
		}

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


public class Main {

	public static void main(String args[]) {

		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();
		int a = 0;
		int max = 0;
		int min = 1000000001;

		for (int i = 0; i < n; i++) {

			a = sc.nextInt();

			if (max < a) {
				max = a;
			}

			if (min > a) {
				min = a;
			}
		}

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