SECCON 2014 online qualifiers: Numbers

numbers.rb

#!/usr/bin/env ruby
# coding: utf-8

require 'socket'

s = TCPSocket.open('number.quals.seccon.jp', 31337)
count = 1

while line = s.readline('?')
  puts line

  minmax = line[/(min|max)/]
  numbers = line.gsub(/\n.*/, '').gsub(' ', '').split(',')
  numbers.map! {|i| i = i.to_i}

  case minmax
  when 'min'
    n = numbers.min
  when 'max'
    n = numbers.max
  end

  puts n
  puts "count: #{count}\n===="
  count += 1
  s.write(n)
end

s.close