
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		
		int n = sc.nextInt();
		
		int max = 0, min = (int) 2e9;
		
		for (int i = 0; i < n; i++) {
			int a = sc.nextInt();
			max = Math.max(max, a);
			min = Math.min(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 max = 0, min = (int) 2e9;
		
		for (int i = 0; i < n; i++) {
			int a = sc.nextInt();
			max = Math.max(max, a);
			min = Math.min(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 max = 0, min = (int) 2e9;
		
		for (int i = 0; i < n; i++) {
			int a = sc.nextInt();
			max = Math.max(max, a);
			min = Math.min(min, a);
		}
		
		System.out.println(max - min);
		
	} main {
		
		Scanner sc = new Scanner(System.in);
		
		int n = sc.nextInt();
		
		int max = 0, min = (int) 2e9;
		
		for (int i = 0; i < n; i++) {
			int a = sc.nextInt();
			max = Math.max(max, a);
			min = Math.min(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 max = 0 max 0 min = (int) 2e9; min (int) 2e9 for (int i = 0; i < n; i++) {
			int a = sc.nextInt();
			max = Math.max(max, a);
			min = Math.min(min, a);
		} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
			int a = sc.nextInt();
			max = Math.max(max, a);
			min = Math.min(min, a);
		} {
			int a = sc.nextInt();
			max = Math.max(max, a);
			min = Math.min(min, a);
		} int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc max = Math.max(max, a) max Math.max(max, a) Math.max Math max a min = Math.min(min, a) min Math.min(min, a) Math.min Math 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 max = 0, min = (int) 2e9;
		
		for (int i = 0; i < n; i++) {
			int a = sc.nextInt();
			max = Math.max(max, a);
			min = Math.min(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 max = 0, min = (int) 2e9;
		
		for (int i = 0; i < n; i++) {
			int a = sc.nextInt();
			max = Math.max(max, a);
			min = Math.min(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 max = 0, min = (int) 2e9;
		
		for (int i = 0; i < n; i++) {
			int a = sc.nextInt();
			max = Math.max(max, a);
			min = Math.min(min, a);
		}
		
		System.out.println(max - min);
		
	}

}
