Write a program to create a function that determines whether elements in an array can be re-arranged to form a consecutive list of numbers where each number appears exactly once. The difference between two numbers will be 1 always.

Input The program will take an integer N as the size of an array. Then it will take the integer values of the array M[].

5
4 2 3 1 0

Output

true

Input

6
1 2 3 4 4 5

Output

false

Notes: If there are any duplicates, it's impossible to form a consecutive list

test-1.js

Write a program to create a function that determines whether a string is a valid code. A code must begin with a pound key # and is exactly 6 characters in length. Each character must be a digit from 0-9 or an alphabetic character from A-F. All alphabetic characters may be uppercase or lowercase.

Input The program will take a string #CD5C5C as input.

Output The output will print either true or false

test-2.js