import java.util.*;
import static java.lang.Math.*;
import java.math.BigInteger;

public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		// 入力
		int n = sc.nextInt();
		int min = Integer.MAX_VALUE;
		int max = 0;
		for(int i = 0; i < n; i++){
		    int a = sc.nextInt();
		    min = min(min, a);
		    max = max(max, a);
		}
		
		// 計算
		int result = max - min;
		
		// 出力
		System.out.println(result);
	}
} import java.util.*; util.* java import static java.lang.Math.*; import static java.lang.Math.*; import static java.lang.Math.*; import java.math.BigInteger; BigInteger java.math public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		// 入力
		int n = sc.nextInt();
		int min = Integer.MAX_VALUE;
		int max = 0;
		for(int i = 0; i < n; i++){
		    int a = sc.nextInt();
		    min = min(min, a);
		    max = max(max, a);
		}
		
		// 計算
		int result = max - min;
		
		// 出力
		System.out.println(result);
	}
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		// 入力
		int n = sc.nextInt();
		int min = Integer.MAX_VALUE;
		int max = 0;
		for(int i = 0; i < n; i++){
		    int a = sc.nextInt();
		    min = min(min, a);
		    max = max(max, a);
		}
		
		// 計算
		int result = max - min;
		
		// 出力
		System.out.println(result);
	} main {
		Scanner sc = new Scanner(System.in);
		
		// 入力
		int n = sc.nextInt();
		int min = Integer.MAX_VALUE;
		int max = 0;
		for(int i = 0; i < n; i++){
		    int a = sc.nextInt();
		    min = min(min, a);
		    max = max(max, a);
		}
		
		// 計算
		int result = max - min;
		
		// 出力
		System.out.println(result);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int min = Integer.MAX_VALUE; min Integer.MAX_VALUE Integer Integer.MAX_VALUE int max = 0; max 0 for(int i = 0; i < n; i++){
		    int a = sc.nextInt();
		    min = min(min, a);
		    max = max(max, a);
		} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
		    int a = sc.nextInt();
		    min = min(min, a);
		    max = max(max, a);
		} {
		    int a = sc.nextInt();
		    min = min(min, a);
		    max = max(max, a);
		} int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc min = min(min, a) min min(min, a) min min a max = max(max, a) max max(max, a) max max a int result = max - min; result max - min max min System.out.println(result) System.out.println System.out System System.out result String[] args args public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		// 入力
		int n = sc.nextInt();
		int min = Integer.MAX_VALUE;
		int max = 0;
		for(int i = 0; i < n; i++){
		    int a = sc.nextInt();
		    min = min(min, a);
		    max = max(max, a);
		}
		
		// 計算
		int result = max - min;
		
		// 出力
		System.out.println(result);
	}
} public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		// 入力
		int n = sc.nextInt();
		int min = Integer.MAX_VALUE;
		int max = 0;
		for(int i = 0; i < n; i++){
		    int a = sc.nextInt();
		    min = min(min, a);
		    max = max(max, a);
		}
		
		// 計算
		int result = max - min;
		
		// 出力
		System.out.println(result);
	}
} Main
import java.util.*;
import static java.lang.Math.*;
import java.math.BigInteger;

public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		// 入力
		int n = sc.nextInt();
		int min = Integer.MAX_VALUE;
		int max = 0;
		for(int i = 0; i < n; i++){
		    int a = sc.nextInt();
		    min = min(min, a);
		    max = max(max, a);
		}
		
		// 計算
		int result = max - min;
		
		// 出力
		System.out.println(result);
	}
}
