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

		int min = Integer.MAX_VALUE;
		int max = Integer.MIN_VALUE;

		for (int i = 0; i < n; i++) {
			if (a[i] < min) {
				min = a[i];
			}
			if (a[i] > max) {
				max = a[i];
			}
		}

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

		int min = Integer.MAX_VALUE;
		int max = Integer.MIN_VALUE;

		for (int i = 0; i < n; i++) {
			if (a[i] < min) {
				min = a[i];
			}
			if (a[i] > max) {
				max = a[i];
			}
		}

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

} 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();
		}

		int min = Integer.MAX_VALUE;
		int max = Integer.MIN_VALUE;

		for (int i = 0; i < n; i++) {
			if (a[i] < min) {
				min = a[i];
			}
			if (a[i] > max) {
				max = a[i];
			}
		}

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

		int min = Integer.MAX_VALUE;
		int max = Integer.MIN_VALUE;

		for (int i = 0; i < n; i++) {
			if (a[i] < min) {
				min = a[i];
			}
			if (a[i] > max) {
				max = a[i];
			}
		}

		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[] 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 int min = Integer.MAX_VALUE; min Integer.MAX_VALUE Integer Integer.MAX_VALUE int max = Integer.MIN_VALUE; max Integer.MIN_VALUE Integer Integer.MIN_VALUE for (int i = 0; i < n; i++) {
			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 {
			if (a[i] < min) {
				min = a[i];
			}
			if (a[i] > max) {
				max = a[i];
			}
		} {
			if (a[i] < min) {
				min = a[i];
			}
			if (a[i] > max) {
				max = a[i];
			}
		} 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 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[] a = new int[n];
		for (int i = 0; i < n; i++) {
			a[i] = sc.nextInt();
		}

		int min = Integer.MAX_VALUE;
		int max = Integer.MIN_VALUE;

		for (int i = 0; i < n; i++) {
			if (a[i] < min) {
				min = a[i];
			}
			if (a[i] > max) {
				max = a[i];
			}
		}

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

		int min = Integer.MAX_VALUE;
		int max = Integer.MIN_VALUE;

		for (int i = 0; i < n; i++) {
			if (a[i] < min) {
				min = a[i];
			}
			if (a[i] > max) {
				max = a[i];
			}
		}

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

		int min = Integer.MAX_VALUE;
		int max = Integer.MIN_VALUE;

		for (int i = 0; i < n; i++) {
			if (a[i] < min) {
				min = a[i];
			}
			if (a[i] > max) {
				max = a[i];
			}
		}

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

}
