import java.util.*;

class Main{

	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		int N = sc.nextInt();

		int min = 1000000000;
		int max = 0;

		for(int i=0; i<N; i++){
			int A = sc.nextInt();
			min = Math.min(min,A);
			max = Math.max(max,A);
		}

		System.out.println(Math.abs(max - min));
	}

} import java.util.*; util.* java class Main{

	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		int N = sc.nextInt();

		int min = 1000000000;
		int max = 0;

		for(int i=0; i<N; i++){
			int A = sc.nextInt();
			min = Math.min(min,A);
			max = Math.max(max,A);
		}

		System.out.println(Math.abs(max - min));
	}

} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		int N = sc.nextInt();

		int min = 1000000000;
		int max = 0;

		for(int i=0; i<N; i++){
			int A = sc.nextInt();
			min = Math.min(min,A);
			max = Math.max(max,A);
		}

		System.out.println(Math.abs(max - min));
	} main {
		Scanner sc = new Scanner(System.in);
		
		int N = sc.nextInt();

		int min = 1000000000;
		int max = 0;

		for(int i=0; i<N; i++){
			int A = sc.nextInt();
			min = Math.min(min,A);
			max = Math.max(max,A);
		}

		System.out.println(Math.abs(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 int max = 0; max 0 for(int i=0; i<N; i++){
			int A = sc.nextInt();
			min = Math.min(min,A);
			max = Math.max(max,A);
		} int i=0; int i=0; i 0 i<N i N i++ i++ i {
			int A = sc.nextInt();
			min = Math.min(min,A);
			max = Math.max(max,A);
		} {
			int A = sc.nextInt();
			min = Math.min(min,A);
			max = Math.max(max,A);
		} int A = sc.nextInt(); A sc.nextInt() sc.nextInt sc min = Math.min(min,A) min Math.min(min,A) Math.min Math min A max = Math.max(max,A) max Math.max(max,A) Math.max Math max A System.out.println(Math.abs(max - min)) System.out.println System.out System System.out Math.abs(max - min) Math.abs Math max - min max min String[] args args
import java.util.*;

class Main{

	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		int N = sc.nextInt();

		int min = 1000000000;
		int max = 0;

		for(int i=0; i<N; i++){
			int A = sc.nextInt();
			min = Math.min(min,A);
			max = Math.max(max,A);
		}

		System.out.println(Math.abs(max - min));
	}

}