
import java.util.Scanner;

public class Main {

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

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

} public class Main {

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

}
