import java.util.*;
public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int[] A = new int [N];
        for (int i = 0; i < N; ++i) {
                A[i] = sc.nextInt();
        }
        Arrays.sort(A);

        System.out.println(A[A.length - 1] - A[0]);
	}
} import java.util.*; util.* java public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int[] A = new int [N];
        for (int i = 0; i < N; ++i) {
                A[i] = sc.nextInt();
        }
        Arrays.sort(A);

        System.out.println(A[A.length - 1] - A[0]);
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int[] A = new int [N];
        for (int i = 0; i < N; ++i) {
                A[i] = sc.nextInt();
        }
        Arrays.sort(A);

        System.out.println(A[A.length - 1] - A[0]);
	} main {
		Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int[] A = new int [N];
        for (int i = 0; i < N; ++i) {
                A[i] = sc.nextInt();
        }
        Arrays.sort(A);

        System.out.println(A[A.length - 1] - A[0]);
	} 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 < N; ++i) {
                A[i] = sc.nextInt();
        } int i = 0; int i = 0; i 0 i < N i N ++i ++i i {
                A[i] = sc.nextInt();
        } {
                A[i] = sc.nextInt();
        } A[i] = sc.nextInt() A[i] A i sc.nextInt() sc.nextInt sc Arrays.sort(A) Arrays.sort Arrays A System.out.println(A[A.length - 1] - A[0]) System.out.println System.out System System.out A[A.length - 1] - A[0] A[A.length - 1] A A.length - 1 A.length A A.length 1 A[0] A 0 String[] args args public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int[] A = new int [N];
        for (int i = 0; i < N; ++i) {
                A[i] = sc.nextInt();
        }
        Arrays.sort(A);

        System.out.println(A[A.length - 1] - A[0]);
	}
} public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int[] A = new int [N];
        for (int i = 0; i < N; ++i) {
                A[i] = sc.nextInt();
        }
        Arrays.sort(A);

        System.out.println(A[A.length - 1] - A[0]);
	}
} Main
import java.util.*;
public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int[] A = new int [N];
        for (int i = 0; i < N; ++i) {
                A[i] = sc.nextInt();
        }
        Arrays.sort(A);

        System.out.println(A[A.length - 1] - A[0]);
	}
}
