

import java.util.Arrays;
import java.util.Scanner;

public class Main {

	static Scanner scanner;

	public static void main(String[] args) {
	    scanner = new Scanner(System.in);

        int n=gi();
        int[] A=new int[n];
        
        for (int i=0; i<n;i++) {
        	A[i]=gi();
        }
        
        Arrays.parallelSort(A);

        System.out.println(A[A.length-1]-A[0]);
        

//	    if (isNumber(s1) && isNumber(s2) && s.charAt(a) == '-') {
//	    	System.out.print("Yes");
//	    }else {
//	    	System.out.print("No");
//	    }



	}
	
	public static int s(int n) {
		String S=String.valueOf(n);
		int c=0;
		for (int i=0; i<S.length();i++) {
			int k=Integer.parseInt(S.substring(i, i+1));
			c+=k;
		}
		return c;
	}

	public static long d(long n) {
		String a=String.valueOf(n);
		return (long)a.length();
	}

	// 文字列として入力を取得
	public static String gs() {
		return scanner.next();
	}

	// intとして入力を取得
	public static int gi() {
		return Integer.parseInt(scanner.next());
	}

	// longとして入力を取得
	public static long gl() {
		return Long.parseLong(scanner.next());
	}

	// doubleとして入力を取得
	public static double gd() {
		return Double.parseDouble(scanner.next());
	}
} import java.util.Arrays; Arrays java.util import java.util.Scanner; Scanner java.util public class Main {

	static Scanner scanner;

	public static void main(String[] args) {
	    scanner = new Scanner(System.in);

        int n=gi();
        int[] A=new int[n];
        
        for (int i=0; i<n;i++) {
        	A[i]=gi();
        }
        
        Arrays.parallelSort(A);

        System.out.println(A[A.length-1]-A[0]);
        

//	    if (isNumber(s1) && isNumber(s2) && s.charAt(a) == '-') {
//	    	System.out.print("Yes");
//	    }else {
//	    	System.out.print("No");
//	    }



	}
	
	public static int s(int n) {
		String S=String.valueOf(n);
		int c=0;
		for (int i=0; i<S.length();i++) {
			int k=Integer.parseInt(S.substring(i, i+1));
			c+=k;
		}
		return c;
	}

	public static long d(long n) {
		String a=String.valueOf(n);
		return (long)a.length();
	}

	// 文字列として入力を取得
	public static String gs() {
		return scanner.next();
	}

	// intとして入力を取得
	public static int gi() {
		return Integer.parseInt(scanner.next());
	}

	// longとして入力を取得
	public static long gl() {
		return Long.parseLong(scanner.next());
	}

	// doubleとして入力を取得
	public static double gd() {
		return Double.parseDouble(scanner.next());
	}
} Main static Scanner scanner; scanner public static void main(String[] args) {
	    scanner = new Scanner(System.in);

        int n=gi();
        int[] A=new int[n];
        
        for (int i=0; i<n;i++) {
        	A[i]=gi();
        }
        
        Arrays.parallelSort(A);

        System.out.println(A[A.length-1]-A[0]);
        

//	    if (isNumber(s1) && isNumber(s2) && s.charAt(a) == '-') {
//	    	System.out.print("Yes");
//	    }else {
//	    	System.out.print("No");
//	    }



	} main {
	    scanner = new Scanner(System.in);

        int n=gi();
        int[] A=new int[n];
        
        for (int i=0; i<n;i++) {
        	A[i]=gi();
        }
        
        Arrays.parallelSort(A);

        System.out.println(A[A.length-1]-A[0]);
        

//	    if (isNumber(s1) && isNumber(s2) && s.charAt(a) == '-') {
//	    	System.out.print("Yes");
//	    }else {
//	    	System.out.print("No");
//	    }



	} scanner = new Scanner(System.in) scanner new Scanner(System.in) int n=gi(); n gi() gi int[] A=new int[n]; A new int[n] n for (int i=0; i<n;i++) {
        	A[i]=gi();
        } int i=0; int i=0; i 0 i<n i n i++ i++ i {
        	A[i]=gi();
        } {
        	A[i]=gi();
        } A[i]=gi() A[i] A i gi() gi Arrays.parallelSort(A) Arrays.parallelSort Arrays A System.out.println(A[A.length-1]-A[0]) System.out.println System.out System System.out A[A.length-1]-A[0] A[A.length-1] A A.length-1 A.length A A.length 1 A[0] A 0 String[] args args public static int s(int n) {
		String S=String.valueOf(n);
		int c=0;
		for (int i=0; i<S.length();i++) {
			int k=Integer.parseInt(S.substring(i, i+1));
			c+=k;
		}
		return c;
	} s {
		String S=String.valueOf(n);
		int c=0;
		for (int i=0; i<S.length();i++) {
			int k=Integer.parseInt(S.substring(i, i+1));
			c+=k;
		}
		return c;
	} String S=String.valueOf(n); S String.valueOf(n) String.valueOf String n int c=0; c 0 for (int i=0; i<S.length();i++) {
			int k=Integer.parseInt(S.substring(i, i+1));
			c+=k;
		} int i=0; int i=0; i 0 i<S.length() i S.length() S.length S i++ i++ i {
			int k=Integer.parseInt(S.substring(i, i+1));
			c+=k;
		} {
			int k=Integer.parseInt(S.substring(i, i+1));
			c+=k;
		} int k=Integer.parseInt(S.substring(i, i+1)); k Integer.parseInt(S.substring(i, i+1)) Integer.parseInt Integer S.substring(i, i+1) S.substring S i i+1 i 1 c+=k c k return c; c int n n public static long d(long n) {
		String a=String.valueOf(n);
		return (long)a.length();
	} d {
		String a=String.valueOf(n);
		return (long)a.length();
	} String a=String.valueOf(n); a String.valueOf(n) String.valueOf String n return (long)a.length(); (long)a.length() a.length a long n n // 文字列として入力を取得
	public static String gs() {
		return scanner.next();
	} gs {
		return scanner.next();
	} return scanner.next(); scanner.next() scanner.next scanner // intとして入力を取得
	public static int gi() {
		return Integer.parseInt(scanner.next());
	} gi {
		return Integer.parseInt(scanner.next());
	} return Integer.parseInt(scanner.next()); Integer.parseInt(scanner.next()) Integer.parseInt Integer scanner.next() scanner.next scanner // longとして入力を取得
	public static long gl() {
		return Long.parseLong(scanner.next());
	} gl {
		return Long.parseLong(scanner.next());
	} return Long.parseLong(scanner.next()); Long.parseLong(scanner.next()) Long.parseLong Long scanner.next() scanner.next scanner // doubleとして入力を取得
	public static double gd() {
		return Double.parseDouble(scanner.next());
	} gd {
		return Double.parseDouble(scanner.next());
	} return Double.parseDouble(scanner.next()); Double.parseDouble(scanner.next()) Double.parseDouble Double scanner.next() scanner.next scanner public class Main {

	static Scanner scanner;

	public static void main(String[] args) {
	    scanner = new Scanner(System.in);

        int n=gi();
        int[] A=new int[n];
        
        for (int i=0; i<n;i++) {
        	A[i]=gi();
        }
        
        Arrays.parallelSort(A);

        System.out.println(A[A.length-1]-A[0]);
        

//	    if (isNumber(s1) && isNumber(s2) && s.charAt(a) == '-') {
//	    	System.out.print("Yes");
//	    }else {
//	    	System.out.print("No");
//	    }



	}
	
	public static int s(int n) {
		String S=String.valueOf(n);
		int c=0;
		for (int i=0; i<S.length();i++) {
			int k=Integer.parseInt(S.substring(i, i+1));
			c+=k;
		}
		return c;
	}

	public static long d(long n) {
		String a=String.valueOf(n);
		return (long)a.length();
	}

	// 文字列として入力を取得
	public static String gs() {
		return scanner.next();
	}

	// intとして入力を取得
	public static int gi() {
		return Integer.parseInt(scanner.next());
	}

	// longとして入力を取得
	public static long gl() {
		return Long.parseLong(scanner.next());
	}

	// doubleとして入力を取得
	public static double gd() {
		return Double.parseDouble(scanner.next());
	}
} public class Main {

	static Scanner scanner;

	public static void main(String[] args) {
	    scanner = new Scanner(System.in);

        int n=gi();
        int[] A=new int[n];
        
        for (int i=0; i<n;i++) {
        	A[i]=gi();
        }
        
        Arrays.parallelSort(A);

        System.out.println(A[A.length-1]-A[0]);
        

//	    if (isNumber(s1) && isNumber(s2) && s.charAt(a) == '-') {
//	    	System.out.print("Yes");
//	    }else {
//	    	System.out.print("No");
//	    }



	}
	
	public static int s(int n) {
		String S=String.valueOf(n);
		int c=0;
		for (int i=0; i<S.length();i++) {
			int k=Integer.parseInt(S.substring(i, i+1));
			c+=k;
		}
		return c;
	}

	public static long d(long n) {
		String a=String.valueOf(n);
		return (long)a.length();
	}

	// 文字列として入力を取得
	public static String gs() {
		return scanner.next();
	}

	// intとして入力を取得
	public static int gi() {
		return Integer.parseInt(scanner.next());
	}

	// longとして入力を取得
	public static long gl() {
		return Long.parseLong(scanner.next());
	}

	// doubleとして入力を取得
	public static double gd() {
		return Double.parseDouble(scanner.next());
	}
} Main


import java.util.Arrays;
import java.util.Scanner;

public class Main {

	static Scanner scanner;

	public static void main(String[] args) {
	    scanner = new Scanner(System.in);

        int n=gi();
        int[] A=new int[n];
        
        for (int i=0; i<n;i++) {
        	A[i]=gi();
        }
        
        Arrays.parallelSort(A);

        System.out.println(A[A.length-1]-A[0]);
        

//	    if (isNumber(s1) && isNumber(s2) && s.charAt(a) == '-') {
//	    	System.out.print("Yes");
//	    }else {
//	    	System.out.print("No");
//	    }



	}
	
	public static int s(int n) {
		String S=String.valueOf(n);
		int c=0;
		for (int i=0; i<S.length();i++) {
			int k=Integer.parseInt(S.substring(i, i+1));
			c+=k;
		}
		return c;
	}

	public static long d(long n) {
		String a=String.valueOf(n);
		return (long)a.length();
	}

	// 文字列として入力を取得
	public static String gs() {
		return scanner.next();
	}

	// intとして入力を取得
	public static int gi() {
		return Integer.parseInt(scanner.next());
	}

	// longとして入力を取得
	public static long gl() {
		return Long.parseLong(scanner.next());
	}

	// doubleとして入力を取得
	public static double gd() {
		return Double.parseDouble(scanner.next());
	}
}