import java.util.*;
public class Main{
	public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int max = 0;
        int min = 1000000001;
        for(int i=0; i<n; i++){
                int temp = sc.nextInt();
                max = Math.max(max, temp);
                min = Math.min(min, temp);
        }
        System.out.println(max-min);
    }
} import java.util.*; util.* java public class Main{
	public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int max = 0;
        int min = 1000000001;
        for(int i=0; i<n; i++){
                int temp = sc.nextInt();
                max = Math.max(max, temp);
                min = Math.min(min, temp);
        }
        System.out.println(max-min);
    }
} Main public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int max = 0;
        int min = 1000000001;
        for(int i=0; i<n; i++){
                int temp = sc.nextInt();
                max = Math.max(max, temp);
                min = Math.min(min, temp);
        }
        System.out.println(max-min);
    } main {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int max = 0;
        int min = 1000000001;
        for(int i=0; i<n; i++){
                int temp = sc.nextInt();
                max = Math.max(max, temp);
                min = Math.min(min, temp);
        }
        System.out.println(max-min);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int max = 0; max 0 int min = 1000000001; min 1000000001 for(int i=0; i<n; i++){
                int temp = sc.nextInt();
                max = Math.max(max, temp);
                min = Math.min(min, temp);
        } int i=0; int i=0; i 0 i<n i n i++ i++ i {
                int temp = sc.nextInt();
                max = Math.max(max, temp);
                min = Math.min(min, temp);
        } {
                int temp = sc.nextInt();
                max = Math.max(max, temp);
                min = Math.min(min, temp);
        } int temp = sc.nextInt(); temp sc.nextInt() sc.nextInt sc max = Math.max(max, temp) max Math.max(max, temp) Math.max Math max temp min = Math.min(min, temp) min Math.min(min, temp) Math.min Math min temp 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 = sc.nextInt();
        int max = 0;
        int min = 1000000001;
        for(int i=0; i<n; i++){
                int temp = sc.nextInt();
                max = Math.max(max, temp);
                min = Math.min(min, temp);
        }
        System.out.println(max-min);
    }
} public class Main{
	public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int max = 0;
        int min = 1000000001;
        for(int i=0; i<n; i++){
                int temp = sc.nextInt();
                max = Math.max(max, temp);
                min = Math.min(min, temp);
        }
        System.out.println(max-min);
    }
} Main
import java.util.*;
public class Main{
	public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int max = 0;
        int min = 1000000001;
        for(int i=0; i<n; i++){
                int temp = sc.nextInt();
                max = Math.max(max, temp);
                min = Math.min(min, temp);
        }
        System.out.println(max-min);
    }
}
