import java.util.Scanner;

public class Main {
	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int N = sc.nextInt();
		int a[] = new int[N];

		int min = 1000000000;
		int max = 0;

		for (int i = 0; i < N; i++) {
			a[i] = sc.nextInt();

			if (a[i] < min) {
				min = a[i];
			}

			if (a[i] > max) {
				max = a[i];
			}

		}
		sc.close();

		System.out.print(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 a[] = new int[N];

		int min = 1000000000;
		int max = 0;

		for (int i = 0; i < N; i++) {
			a[i] = sc.nextInt();

			if (a[i] < min) {
				min = a[i];
			}

			if (a[i] > max) {
				max = a[i];
			}

		}
		sc.close();

		System.out.print(max - min);

	}
} Main public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int N = sc.nextInt();
		int a[] = new int[N];

		int min = 1000000000;
		int max = 0;

		for (int i = 0; i < N; i++) {
			a[i] = sc.nextInt();

			if (a[i] < min) {
				min = a[i];
			}

			if (a[i] > max) {
				max = a[i];
			}

		}
		sc.close();

		System.out.print(max - min);

	} main {

		Scanner sc = new Scanner(System.in);

		int N = sc.nextInt();
		int a[] = new int[N];

		int min = 1000000000;
		int max = 0;

		for (int i = 0; i < N; i++) {
			a[i] = sc.nextInt();

			if (a[i] < min) {
				min = a[i];
			}

			if (a[i] > max) {
				max = a[i];
			}

		}
		sc.close();

		System.out.print(max - min);

	} 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 int min = 1000000000; min 1000000000 int max = 0; max 0 for (int i = 0; i < N; i++) {
			a[i] = sc.nextInt();

			if (a[i] < min) {
				min = a[i];
			}

			if (a[i] > max) {
				max = a[i];
			}

		} int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
			a[i] = sc.nextInt();

			if (a[i] < min) {
				min = a[i];
			}

			if (a[i] > max) {
				max = a[i];
			}

		} {
			a[i] = sc.nextInt();

			if (a[i] < min) {
				min = a[i];
			}

			if (a[i] > max) {
				max = a[i];
			}

		} a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc if (a[i] < min) {
				min = a[i];
			} a[i] < min a[i] a i min {
				min = a[i];
			} min = a[i] min a[i] a i if (a[i] > max) {
				max = a[i];
			} a[i] > max a[i] a i max {
				max = a[i];
			} max = a[i] max a[i] a i sc.close() sc.close sc System.out.print(max - min) System.out.print 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 a[] = new int[N];

		int min = 1000000000;
		int max = 0;

		for (int i = 0; i < N; i++) {
			a[i] = sc.nextInt();

			if (a[i] < min) {
				min = a[i];
			}

			if (a[i] > max) {
				max = a[i];
			}

		}
		sc.close();

		System.out.print(max - min);

	}
} public class Main {
	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int N = sc.nextInt();
		int a[] = new int[N];

		int min = 1000000000;
		int max = 0;

		for (int i = 0; i < N; i++) {
			a[i] = sc.nextInt();

			if (a[i] < min) {
				min = a[i];
			}

			if (a[i] > max) {
				max = a[i];
			}

		}
		sc.close();

		System.out.print(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 a[] = new int[N];

		int min = 1000000000;
		int max = 0;

		for (int i = 0; i < N; i++) {
			a[i] = sc.nextInt();

			if (a[i] < min) {
				min = a[i];
			}

			if (a[i] > max) {
				max = a[i];
			}

		}
		sc.close();

		System.out.print(max - min);

	}
}