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

public class Main {

	@SuppressWarnings("resource")
	public static void main(String args[]) {
		Scanner scanner = new Scanner(System.in);
		int n = scanner.nextInt();
		int a[]=new int [n];
		
		for(int i=0;i<n;i++) {
			a[i]=scanner.nextInt();
		}
		Arrays.sort(a);
		
		System.out.println(a[n-1]-a[0]);
	}
} import java.util.Arrays; Arrays java.util import java.util.Scanner; Scanner java.util public class Main {

	@SuppressWarnings("resource")
	public static void main(String args[]) {
		Scanner scanner = new Scanner(System.in);
		int n = scanner.nextInt();
		int a[]=new int [n];
		
		for(int i=0;i<n;i++) {
			a[i]=scanner.nextInt();
		}
		Arrays.sort(a);
		
		System.out.println(a[n-1]-a[0]);
	}
} Main @SuppressWarnings("resource")
	public static void main(String args[]) {
		Scanner scanner = new Scanner(System.in);
		int n = scanner.nextInt();
		int a[]=new int [n];
		
		for(int i=0;i<n;i++) {
			a[i]=scanner.nextInt();
		}
		Arrays.sort(a);
		
		System.out.println(a[n-1]-a[0]);
	} main {
		Scanner scanner = new Scanner(System.in);
		int n = scanner.nextInt();
		int a[]=new int [n];
		
		for(int i=0;i<n;i++) {
			a[i]=scanner.nextInt();
		}
		Arrays.sort(a);
		
		System.out.println(a[n-1]-a[0]);
	} Scanner scanner = new Scanner(System.in); scanner new Scanner(System.in) int n = scanner.nextInt(); n scanner.nextInt() scanner.nextInt scanner int a[]=new int [n]; a new int [n] n for(int i=0;i<n;i++) {
			a[i]=scanner.nextInt();
		} int i=0; int i=0; i 0 i<n i n i++ i++ i {
			a[i]=scanner.nextInt();
		} {
			a[i]=scanner.nextInt();
		} a[i]=scanner.nextInt() a[i] a i scanner.nextInt() scanner.nextInt scanner 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 String args[] args public class Main {

	@SuppressWarnings("resource")
	public static void main(String args[]) {
		Scanner scanner = new Scanner(System.in);
		int n = scanner.nextInt();
		int a[]=new int [n];
		
		for(int i=0;i<n;i++) {
			a[i]=scanner.nextInt();
		}
		Arrays.sort(a);
		
		System.out.println(a[n-1]-a[0]);
	}
} public class Main {

	@SuppressWarnings("resource")
	public static void main(String args[]) {
		Scanner scanner = new Scanner(System.in);
		int n = scanner.nextInt();
		int a[]=new int [n];
		
		for(int i=0;i<n;i++) {
			a[i]=scanner.nextInt();
		}
		Arrays.sort(a);
		
		System.out.println(a[n-1]-a[0]);
	}
} Main
import java.util.Arrays;
import java.util.Scanner;

public class Main {

	@SuppressWarnings("resource")
	public static void main(String args[]) {
		Scanner scanner = new Scanner(System.in);
		int n = scanner.nextInt();
		int a[]=new int [n];
		
		for(int i=0;i<n;i++) {
			a[i]=scanner.nextInt();
		}
		Arrays.sort(a);
		
		System.out.println(a[n-1]-a[0]);
	}
}
