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;
      int[] array = new int[n];
      for(int i = 0;i < n;i++){
      	array[i] = sc.nextInt();
        max = Math.max(max,array[i]);
        min = Math.min(min,array[i]);
      }
      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;
      int[] array = new int[n];
      for(int i = 0;i < n;i++){
      	array[i] = sc.nextInt();
        max = Math.max(max,array[i]);
        min = Math.min(min,array[i]);
      }
      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;
      int[] array = new int[n];
      for(int i = 0;i < n;i++){
      	array[i] = sc.nextInt();
        max = Math.max(max,array[i]);
        min = Math.min(min,array[i]);
      }
      System.out.println(max-min);
    } main {
    	Scanner sc = new Scanner(System.in);
      int n = sc.nextInt();
      int max = 0;
      int min = 1000000001;
      int[] array = new int[n];
      for(int i = 0;i < n;i++){
      	array[i] = sc.nextInt();
        max = Math.max(max,array[i]);
        min = Math.min(min,array[i]);
      }
      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 int[] array = new int[n]; array new int[n] n for(int i = 0;i < n;i++){
      	array[i] = sc.nextInt();
        max = Math.max(max,array[i]);
        min = Math.min(min,array[i]);
      } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
      	array[i] = sc.nextInt();
        max = Math.max(max,array[i]);
        min = Math.min(min,array[i]);
      } {
      	array[i] = sc.nextInt();
        max = Math.max(max,array[i]);
        min = Math.min(min,array[i]);
      } array[i] = sc.nextInt() array[i] array i sc.nextInt() sc.nextInt sc max = Math.max(max,array[i]) max Math.max(max,array[i]) Math.max Math max array[i] array i min = Math.min(min,array[i]) min Math.min(min,array[i]) Math.min Math min array[i] array i 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;
      int[] array = new int[n];
      for(int i = 0;i < n;i++){
      	array[i] = sc.nextInt();
        max = Math.max(max,array[i]);
        min = Math.min(min,array[i]);
      }
      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;
      int[] array = new int[n];
      for(int i = 0;i < n;i++){
      	array[i] = sc.nextInt();
        max = Math.max(max,array[i]);
        min = Math.min(min,array[i]);
      }
      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;
      int[] array = new int[n];
      for(int i = 0;i < n;i++){
      	array[i] = sc.nextInt();
        max = Math.max(max,array[i]);
        min = Math.min(min,array[i]);
      }
      System.out.println(max-min);
    }
}
