import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);
		int length = sc.nextInt();
		int max = 0;
		int min = 0;
		for (int i = 0; i < length; i++) {
			int A = sc.nextInt();
			if (i == 0) {
				max = A;
				min = A;
			}

			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) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);
		int length = sc.nextInt();
		int max = 0;
		int min = 0;
		for (int i = 0; i < length; i++) {
			int A = sc.nextInt();
			if (i == 0) {
				max = A;
				min = A;
			}

			if (max < A) {
				max = A;
			}
			if (min > A) {
				min = A;
			}
			
		}
		System.out.println(max-min);
	}

} Main public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);
		int length = sc.nextInt();
		int max = 0;
		int min = 0;
		for (int i = 0; i < length; i++) {
			int A = sc.nextInt();
			if (i == 0) {
				max = A;
				min = A;
			}

			if (max < A) {
				max = A;
			}
			if (min > A) {
				min = A;
			}
			
		}
		System.out.println(max-min);
	} main {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);
		int length = sc.nextInt();
		int max = 0;
		int min = 0;
		for (int i = 0; i < length; i++) {
			int A = sc.nextInt();
			if (i == 0) {
				max = A;
				min = A;
			}

			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 length = sc.nextInt(); length sc.nextInt() sc.nextInt sc int max = 0; max 0 int min = 0; min 0 for (int i = 0; i < length; i++) {
			int A = sc.nextInt();
			if (i == 0) {
				max = A;
				min = A;
			}

			if (max < A) {
				max = A;
			}
			if (min > A) {
				min = A;
			}
			
		} int i = 0; int i = 0; i 0 i < length i length i++ i++ i {
			int A = sc.nextInt();
			if (i == 0) {
				max = A;
				min = A;
			}

			if (max < A) {
				max = A;
			}
			if (min > A) {
				min = A;
			}
			
		} {
			int A = sc.nextInt();
			if (i == 0) {
				max = A;
				min = A;
			}

			if (max < A) {
				max = A;
			}
			if (min > A) {
				min = A;
			}
			
		} int A = sc.nextInt(); A sc.nextInt() sc.nextInt sc if (i == 0) {
				max = A;
				min = A;
			} i == 0 i 0 {
				max = A;
				min = A;
			} max = A max A min = A min A if (max < A) {
				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 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) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);
		int length = sc.nextInt();
		int max = 0;
		int min = 0;
		for (int i = 0; i < length; i++) {
			int A = sc.nextInt();
			if (i == 0) {
				max = A;
				min = A;
			}

			if (max < A) {
				max = A;
			}
			if (min > A) {
				min = A;
			}
			
		}
		System.out.println(max-min);
	}

} public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);
		int length = sc.nextInt();
		int max = 0;
		int min = 0;
		for (int i = 0; i < length; i++) {
			int A = sc.nextInt();
			if (i == 0) {
				max = A;
				min = A;
			}

			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) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);
		int length = sc.nextInt();
		int max = 0;
		int min = 0;
		for (int i = 0; i < length; i++) {
			int A = sc.nextInt();
			if (i == 0) {
				max = A;
				min = A;
			}

			if (max < A) {
				max = A;
			}
			if (min > A) {
				min = A;
			}
			
		}
		System.out.println(max-min);
	}

}