check ruby version for codevs

codevs_check.rb

File.open('result.txt', 'w') do |f|
  f << RUBY_DESCRIPTION
  while line = STDIN.gets
    f << line
    STDOUT.print '0'
    STDOUT.flush
  end
end

result.txt

ruby 1.8.7 (2010-01-10 patchlevel 249) [universal-darwin11.0]40
7 7
1111111
1000001
1s00001
1s000g1
1s00001
1000001
1111111
25
END
10 100 0 1
1 4 12 44 40
END

resut.txt

ruby 1.9.3p0 (2011-10-30 revision 33570) [x86_64-darwin11.2.0]40
7 7
1111111
1000001
1s00001
1s000g1
1s00001
1000001
1111111
25
END
10 100 0 1
1 4 12 44 40
END