import java.util.Scanner;

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