import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int max = 0, min = 1000000000;
		int n = sc.nextInt();
		int a = 0;
		for(int i = 0; i < n; i++) {
			a = sc.nextInt();
			if(max < a) {
				max = a;
			}
			if(a < min) {
				min = a;
			}
		}
		System.out.println(max - min);
		sc.close();
	}

} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int max = 0, min = 1000000000;
		int n = sc.nextInt();
		int a = 0;
		for(int i = 0; i < n; i++) {
			a = sc.nextInt();
			if(max < a) {
				max = a;
			}
			if(a < min) {
				min = a;
			}
		}
		System.out.println(max - min);
		sc.close();
	}

} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int max = 0, min = 1000000000;
		int n = sc.nextInt();
		int a = 0;
		for(int i = 0; i < n; i++) {
			a = sc.nextInt();
			if(max < a) {
				max = a;
			}
			if(a < min) {
				min = a;
			}
		}
		System.out.println(max - min);
		sc.close();
	} main {
		Scanner sc = new Scanner(System.in);
		int max = 0, min = 1000000000;
		int n = sc.nextInt();
		int a = 0;
		for(int i = 0; i < n; i++) {
			a = sc.nextInt();
			if(max < a) {
				max = a;
			}
			if(a < min) {
				min = a;
			}
		}
		System.out.println(max - min);
		sc.close();
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int max = 0 max 0 min = 1000000000; min 1000000000 int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int a = 0; a 0 for(int i = 0; i < n; i++) {
			a = sc.nextInt();
			if(max < a) {
				max = a;
			}
			if(a < min) {
				min = a;
			}
		} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
			a = sc.nextInt();
			if(max < a) {
				max = a;
			}
			if(a < min) {
				min = a;
			}
		} {
			a = sc.nextInt();
			if(max < a) {
				max = a;
			}
			if(a < min) {
				min = a;
			}
		} a = sc.nextInt() a sc.nextInt() sc.nextInt sc if(max < a) {
				max = a;
			} max < a max a {
				max = a;
			} max = a max a if(a < min) {
				min = a;
			} a < min a min {
				min = a;
			} min = a min a System.out.println(max - min) System.out.println System.out System System.out max - min max min sc.close() sc.close sc String[] args args public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int max = 0, min = 1000000000;
		int n = sc.nextInt();
		int a = 0;
		for(int i = 0; i < n; i++) {
			a = sc.nextInt();
			if(max < a) {
				max = a;
			}
			if(a < min) {
				min = a;
			}
		}
		System.out.println(max - min);
		sc.close();
	}

} public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int max = 0, min = 1000000000;
		int n = sc.nextInt();
		int a = 0;
		for(int i = 0; i < n; i++) {
			a = sc.nextInt();
			if(max < a) {
				max = a;
			}
			if(a < min) {
				min = a;
			}
		}
		System.out.println(max - min);
		sc.close();
	}

} Main
import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int max = 0, min = 1000000000;
		int n = sc.nextInt();
		int a = 0;
		for(int i = 0; i < n; i++) {
			a = sc.nextInt();
			if(max < a) {
				max = a;
			}
			if(a < min) {
				min = a;
			}
		}
		System.out.println(max - min);
		sc.close();
	}

}
