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