import java.util.ArrayList;
import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N =Integer.parseInt(sc.next());
        int min = Integer.MAX_VALUE;
        int max = Integer.MIN_VALUE;
        for(int i = 0; i < N ;i++){
            int in = Integer.parseInt(sc.next());
            if(min > in){
                min = in;
            }
            if(max < in){
                max = in;
            }
        }
        System.out.println(max-min);
    }
} import java.util.ArrayList; ArrayList java.util import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N =Integer.parseInt(sc.next());
        int min = Integer.MAX_VALUE;
        int max = Integer.MIN_VALUE;
        for(int i = 0; i < N ;i++){
            int in = Integer.parseInt(sc.next());
            if(min > in){
                min = in;
            }
            if(max < in){
                max = in;
            }
        }
        System.out.println(max-min);
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N =Integer.parseInt(sc.next());
        int min = Integer.MAX_VALUE;
        int max = Integer.MIN_VALUE;
        for(int i = 0; i < N ;i++){
            int in = Integer.parseInt(sc.next());
            if(min > in){
                min = in;
            }
            if(max < in){
                max = in;
            }
        }
        System.out.println(max-min);
    } main {
        Scanner sc = new Scanner(System.in);
        int N =Integer.parseInt(sc.next());
        int min = Integer.MAX_VALUE;
        int max = Integer.MIN_VALUE;
        for(int i = 0; i < N ;i++){
            int in = Integer.parseInt(sc.next());
            if(min > in){
                min = in;
            }
            if(max < in){
                max = in;
            }
        }
        System.out.println(max-min);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N =Integer.parseInt(sc.next()); N Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int min = Integer.MAX_VALUE; min Integer.MAX_VALUE Integer Integer.MAX_VALUE int max = Integer.MIN_VALUE; max Integer.MIN_VALUE Integer Integer.MIN_VALUE for(int i = 0; i < N ;i++){
            int in = Integer.parseInt(sc.next());
            if(min > in){
                min = in;
            }
            if(max < in){
                max = in;
            }
        } int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
            int in = Integer.parseInt(sc.next());
            if(min > in){
                min = in;
            }
            if(max < in){
                max = in;
            }
        } {
            int in = Integer.parseInt(sc.next());
            if(min > in){
                min = in;
            }
            if(max < in){
                max = in;
            }
        } int in = Integer.parseInt(sc.next()); in Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc if(min > in){
                min = in;
            } min > in min in {
                min = in;
            } min = in min in if(max < in){
                max = in;
            } max < in max in {
                max = in;
            } max = in max in 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) {
        Scanner sc = new Scanner(System.in);
        int N =Integer.parseInt(sc.next());
        int min = Integer.MAX_VALUE;
        int max = Integer.MIN_VALUE;
        for(int i = 0; i < N ;i++){
            int in = Integer.parseInt(sc.next());
            if(min > in){
                min = in;
            }
            if(max < in){
                max = in;
            }
        }
        System.out.println(max-min);
    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N =Integer.parseInt(sc.next());
        int min = Integer.MAX_VALUE;
        int max = Integer.MIN_VALUE;
        for(int i = 0; i < N ;i++){
            int in = Integer.parseInt(sc.next());
            if(min > in){
                min = in;
            }
            if(max < in){
                max = in;
            }
        }
        System.out.println(max-min);
    }
} Main
import java.util.ArrayList;
import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N =Integer.parseInt(sc.next());
        int min = Integer.MAX_VALUE;
        int max = Integer.MIN_VALUE;
        for(int i = 0; i < N ;i++){
            int in = Integer.parseInt(sc.next());
            if(min > in){
                min = in;
            }
            if(max < in){
                max = in;
            }
        }
        System.out.println(max-min);
    }
}