h4[K3r5 mini help

decrypt.rb

#!/usr/bin/ruby
#
# simple Brute-Force recursive algorithm for decrypting crypt function
# try whatever you want in crypt function
#
# enjoy

require 'zlib'

def decrypt(x)
  i = 0
  i += 1 until(x == crypt(i))
  i
end

def crypt(x)
  Zlib::crc32(x.to_s).to_i * 2**4 + 22
end

puts "Write number:"
x = gets.to_i
puts "Encrypting number #{x} ..."
whatever = crypt(x)
puts "Number encrypted to #{whatever}"
puts "Decrypting #{whatever} ..."
res = decrypt(whatever)
puts "Decrypted to #{res}"

if res == x 
  puts "Number succesfully decrypted!"
else 
  puts "Number was not decrypted correctly"
end