import java.util.Scanner;

public class Main {

	public static void main(String args[]) {

		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();

		int max = 0;
		int min = Integer.MAX_VALUE;
		for(int i=0;i<N;i++) {
			int A = (int)Math.abs(sc.nextInt());
			if(max < A) max = A;
			if(min > A) min = A;
		}
		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 max = 0;
		int min = Integer.MAX_VALUE;
		for(int i=0;i<N;i++) {
			int A = (int)Math.abs(sc.nextInt());
			if(max < A) max = A;
			if(min > A) min = A;
		}
		System.out.println(max - min);
	}
} Main public static void main(String args[]) {

		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();

		int max = 0;
		int min = Integer.MAX_VALUE;
		for(int i=0;i<N;i++) {
			int A = (int)Math.abs(sc.nextInt());
			if(max < A) max = A;
			if(min > A) min = A;
		}
		System.out.println(max - min);
	} main {

		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();

		int max = 0;
		int min = Integer.MAX_VALUE;
		for(int i=0;i<N;i++) {
			int A = (int)Math.abs(sc.nextInt());
			if(max < A) max = A;
			if(min > A) min = A;
		}
		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 max = 0; max 0 int min = Integer.MAX_VALUE; min Integer.MAX_VALUE Integer Integer.MAX_VALUE for(int i=0;i<N;i++) {
			int A = (int)Math.abs(sc.nextInt());
			if(max < A) max = A;
			if(min > A) min = A;
		} int i=0; int i=0; i 0 i<N i N i++ i++ i {
			int A = (int)Math.abs(sc.nextInt());
			if(max < A) max = A;
			if(min > A) min = A;
		} {
			int A = (int)Math.abs(sc.nextInt());
			if(max < A) max = A;
			if(min > A) min = A;
		} int A = (int)Math.abs(sc.nextInt()); A (int)Math.abs(sc.nextInt()) Math.abs Math sc.nextInt() sc.nextInt sc if(max < A) max = A; max < A max A max = A max A if(min > A) min = A; min > A min A min = A min A 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 max = 0;
		int min = Integer.MAX_VALUE;
		for(int i=0;i<N;i++) {
			int A = (int)Math.abs(sc.nextInt());
			if(max < A) max = A;
			if(min > A) min = A;
		}
		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 max = 0;
		int min = Integer.MAX_VALUE;
		for(int i=0;i<N;i++) {
			int A = (int)Math.abs(sc.nextInt());
			if(max < A) max = A;
			if(min > A) min = A;
		}
		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 max = 0;
		int min = Integer.MAX_VALUE;
		for(int i=0;i<N;i++) {
			int A = (int)Math.abs(sc.nextInt());
			if(max < A) max = A;
			if(min > A) min = A;
		}
		System.out.println(max - min);
	}
}
