import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int[] a = new int[n];
		for (int i = 0; i < a.length; i++) {
			a[i] = sc.nextInt();
		}
		sc.close();

		int min = Integer.MAX_VALUE;
		int max = 0;
		for (int i = 0; i < a.length; i++) {
			min = Math.min(min, a[i]);
			max = Math.max(max, a[i]);
		}
		System.out.println(max - min);
	}
} import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int[] a = new int[n];
		for (int i = 0; i < a.length; i++) {
			a[i] = sc.nextInt();
		}
		sc.close();

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

		int min = Integer.MAX_VALUE;
		int max = 0;
		for (int i = 0; i < a.length; i++) {
			min = Math.min(min, a[i]);
			max = Math.max(max, a[i]);
		}
		System.out.println(max - min);
	} main {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int[] a = new int[n];
		for (int i = 0; i < a.length; i++) {
			a[i] = sc.nextInt();
		}
		sc.close();

		int min = Integer.MAX_VALUE;
		int max = 0;
		for (int i = 0; i < a.length; i++) {
			min = Math.min(min, a[i]);
			max = Math.max(max, a[i]);
		}
		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 = new int[n]; a new int[n] n for (int i = 0; i < a.length; i++) {
			a[i] = sc.nextInt();
		} int i = 0; int i = 0; i 0 i < a.length i a.length a a.length i++ i++ i {
			a[i] = sc.nextInt();
		} {
			a[i] = sc.nextInt();
		} a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc sc.close() sc.close sc int min = Integer.MAX_VALUE; min Integer.MAX_VALUE Integer Integer.MAX_VALUE int max = 0; max 0 for (int i = 0; i < a.length; i++) {
			min = Math.min(min, a[i]);
			max = Math.max(max, a[i]);
		} int i = 0; int i = 0; i 0 i < a.length i a.length a a.length i++ i++ i {
			min = Math.min(min, a[i]);
			max = Math.max(max, a[i]);
		} {
			min = Math.min(min, a[i]);
			max = Math.max(max, a[i]);
		} min = Math.min(min, a[i]) min Math.min(min, a[i]) Math.min Math min a[i] a i max = Math.max(max, a[i]) max Math.max(max, a[i]) Math.max Math max a[i] a i 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) throws Exception {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int[] a = new int[n];
		for (int i = 0; i < a.length; i++) {
			a[i] = sc.nextInt();
		}
		sc.close();

		int min = Integer.MAX_VALUE;
		int max = 0;
		for (int i = 0; i < a.length; i++) {
			min = Math.min(min, a[i]);
			max = Math.max(max, a[i]);
		}
		System.out.println(max - min);
	}
} public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int[] a = new int[n];
		for (int i = 0; i < a.length; i++) {
			a[i] = sc.nextInt();
		}
		sc.close();

		int min = Integer.MAX_VALUE;
		int max = 0;
		for (int i = 0; i < a.length; i++) {
			min = Math.min(min, a[i]);
			max = Math.max(max, a[i]);
		}
		System.out.println(max - min);
	}
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int[] a = new int[n];
		for (int i = 0; i < a.length; i++) {
			a[i] = sc.nextInt();
		}
		sc.close();

		int min = Integer.MAX_VALUE;
		int max = 0;
		for (int i = 0; i < a.length; i++) {
			min = Math.min(min, a[i]);
			max = Math.max(max, a[i]);
		}
		System.out.println(max - min);
	}
}
