import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n=sc.nextInt();
		int min=1000000000,max=0;
		for(int i=0; i<n; i++) {
			int s=sc.nextInt();
			if(min>s)min=s;
			if(max<s)max=s;
		}
		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 min=1000000000,max=0;
		for(int i=0; i<n; i++) {
			int s=sc.nextInt();
			if(min>s)min=s;
			if(max<s)max=s;
		}
		System.out.println(max-min);
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n=sc.nextInt();
		int min=1000000000,max=0;
		for(int i=0; i<n; i++) {
			int s=sc.nextInt();
			if(min>s)min=s;
			if(max<s)max=s;
		}
		System.out.println(max-min);
	} main {
		Scanner sc = new Scanner(System.in);
		int n=sc.nextInt();
		int min=1000000000,max=0;
		for(int i=0; i<n; i++) {
			int s=sc.nextInt();
			if(min>s)min=s;
			if(max<s)max=s;
		}
		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 min=1000000000 min 1000000000 max=0; max 0 for(int i=0; i<n; i++) {
			int s=sc.nextInt();
			if(min>s)min=s;
			if(max<s)max=s;
		} int i=0; int i=0; i 0 i<n i n i++ i++ i {
			int s=sc.nextInt();
			if(min>s)min=s;
			if(max<s)max=s;
		} {
			int s=sc.nextInt();
			if(min>s)min=s;
			if(max<s)max=s;
		} int s=sc.nextInt(); s sc.nextInt() sc.nextInt sc if(min>s)min=s; min>s min s min=s min s if(max<s)max=s; max<s max s max=s max s 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 min=1000000000,max=0;
		for(int i=0; i<n; i++) {
			int s=sc.nextInt();
			if(min>s)min=s;
			if(max<s)max=s;
		}
		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 min=1000000000,max=0;
		for(int i=0; i<n; i++) {
			int s=sc.nextInt();
			if(min>s)min=s;
			if(max<s)max=s;
		}
		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 min=1000000000,max=0;
		for(int i=0; i<n; i++) {
			int s=sc.nextInt();
			if(min>s)min=s;
			if(max<s)max=s;
		}
		System.out.println(max-min);
	}
}
