import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		
		int n = scanner.nextInt();
		int[] a = new int[n];
		
		for(int i = 0; i < a.length; i++) {
			a[i] = scanner.nextInt();
		}
		
		for(int i = 0;  i < a.length; i++) {
			for(int j = a.length-1; j > i ; j--) {
				if(a[j-1] > a[j]) {
					int tmp = a[j-1];
					a[j-1] = a[j];
					a[j] = tmp;
				}
			}
		}
		
		System.out.println(a[n-1] - a[0]);
	}

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

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		
		int n = scanner.nextInt();
		int[] a = new int[n];
		
		for(int i = 0; i < a.length; i++) {
			a[i] = scanner.nextInt();
		}
		
		for(int i = 0;  i < a.length; i++) {
			for(int j = a.length-1; j > i ; j--) {
				if(a[j-1] > a[j]) {
					int tmp = a[j-1];
					a[j-1] = a[j];
					a[j] = tmp;
				}
			}
		}
		
		System.out.println(a[n-1] - a[0]);
	}

} Main public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		
		int n = scanner.nextInt();
		int[] a = new int[n];
		
		for(int i = 0; i < a.length; i++) {
			a[i] = scanner.nextInt();
		}
		
		for(int i = 0;  i < a.length; i++) {
			for(int j = a.length-1; j > i ; j--) {
				if(a[j-1] > a[j]) {
					int tmp = a[j-1];
					a[j-1] = a[j];
					a[j] = tmp;
				}
			}
		}
		
		System.out.println(a[n-1] - a[0]);
	} main {
		Scanner scanner = new Scanner(System.in);
		
		int n = scanner.nextInt();
		int[] a = new int[n];
		
		for(int i = 0; i < a.length; i++) {
			a[i] = scanner.nextInt();
		}
		
		for(int i = 0;  i < a.length; i++) {
			for(int j = a.length-1; j > i ; j--) {
				if(a[j-1] > a[j]) {
					int tmp = a[j-1];
					a[j-1] = a[j];
					a[j] = tmp;
				}
			}
		}
		
		System.out.println(a[n-1] - a[0]);
	} Scanner scanner = new Scanner(System.in); scanner new Scanner(System.in) int n = scanner.nextInt(); n scanner.nextInt() scanner.nextInt scanner int[] a = new int[n]; a new int[n] n for(int i = 0; i < a.length; i++) {
			a[i] = scanner.nextInt();
		} int i = 0; int i = 0; i 0 i < a.length i a.length a a.length i++ i++ i {
			a[i] = scanner.nextInt();
		} {
			a[i] = scanner.nextInt();
		} a[i] = scanner.nextInt() a[i] a i scanner.nextInt() scanner.nextInt scanner for(int i = 0;  i < a.length; i++) {
			for(int j = a.length-1; j > i ; j--) {
				if(a[j-1] > a[j]) {
					int tmp = a[j-1];
					a[j-1] = a[j];
					a[j] = tmp;
				}
			}
		} int i = 0; int i = 0; i 0 i < a.length i a.length a a.length i++ i++ i {
			for(int j = a.length-1; j > i ; j--) {
				if(a[j-1] > a[j]) {
					int tmp = a[j-1];
					a[j-1] = a[j];
					a[j] = tmp;
				}
			}
		} {
			for(int j = a.length-1; j > i ; j--) {
				if(a[j-1] > a[j]) {
					int tmp = a[j-1];
					a[j-1] = a[j];
					a[j] = tmp;
				}
			}
		} for(int j = a.length-1; j > i ; j--) {
				if(a[j-1] > a[j]) {
					int tmp = a[j-1];
					a[j-1] = a[j];
					a[j] = tmp;
				}
			} int j = a.length-1; int j = a.length-1; j a.length-1 a.length a a.length 1 j > i j i j-- j-- j {
				if(a[j-1] > a[j]) {
					int tmp = a[j-1];
					a[j-1] = a[j];
					a[j] = tmp;
				}
			} {
				if(a[j-1] > a[j]) {
					int tmp = a[j-1];
					a[j-1] = a[j];
					a[j] = tmp;
				}
			} if(a[j-1] > a[j]) {
					int tmp = a[j-1];
					a[j-1] = a[j];
					a[j] = tmp;
				} a[j-1] > a[j] a[j-1] a j-1 j 1 a[j] a j {
					int tmp = a[j-1];
					a[j-1] = a[j];
					a[j] = tmp;
				} int tmp = a[j-1]; tmp a[j-1] a j-1 j 1 a[j-1] = a[j] a[j-1] a j-1 j 1 a[j] a j a[j] = tmp a[j] a j tmp System.out.println(a[n-1] - a[0]) System.out.println System.out System System.out a[n-1] - a[0] a[n-1] a n-1 n 1 a[0] a 0 String[] args args public class Main {

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		
		int n = scanner.nextInt();
		int[] a = new int[n];
		
		for(int i = 0; i < a.length; i++) {
			a[i] = scanner.nextInt();
		}
		
		for(int i = 0;  i < a.length; i++) {
			for(int j = a.length-1; j > i ; j--) {
				if(a[j-1] > a[j]) {
					int tmp = a[j-1];
					a[j-1] = a[j];
					a[j] = tmp;
				}
			}
		}
		
		System.out.println(a[n-1] - a[0]);
	}

} public class Main {

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		
		int n = scanner.nextInt();
		int[] a = new int[n];
		
		for(int i = 0; i < a.length; i++) {
			a[i] = scanner.nextInt();
		}
		
		for(int i = 0;  i < a.length; i++) {
			for(int j = a.length-1; j > i ; j--) {
				if(a[j-1] > a[j]) {
					int tmp = a[j-1];
					a[j-1] = a[j];
					a[j] = tmp;
				}
			}
		}
		
		System.out.println(a[n-1] - a[0]);
	}

} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		
		int n = scanner.nextInt();
		int[] a = new int[n];
		
		for(int i = 0; i < a.length; i++) {
			a[i] = scanner.nextInt();
		}
		
		for(int i = 0;  i < a.length; i++) {
			for(int j = a.length-1; j > i ; j--) {
				if(a[j-1] > a[j]) {
					int tmp = a[j-1];
					a[j-1] = a[j];
					a[j] = tmp;
				}
			}
		}
		
		System.out.println(a[n-1] - a[0]);
	}

}
