オフラインリアルタイムどう書く第5回の参考問題をRubyで解く

MOVE = {
  0 => { 4=> 4,-4=>-4, 1=> 1,-1=>-1},
  1 => { 4=> 1,-4=>-1, 1=> 4,-1=>-4},
  2 => { 4=>-1,-4=> 1, 1=>-4,-1=> 4},
}
BOARD = '----ABC-DEF-GHI----'.split('')

def solve(q)
  pat = ('----%c%c%c-%c%c%c-%c%c%c----'%q.split('')).split('').map{|e| e=='-' ? -1:e.to_i}
  pos, mv = [5, 4]
  a = ''
  until(pat[pos]<0)
    a += BOARD[pos]
    mv = MOVE[pat[pos]][mv]
    pos += mv
  end
  a
end

DATA.readlines.each do |line|
  no,q,a = line.chop.split(/\s+/)
  ans = solve(q)
  print ans
  puts ans == a ? ' o' : ' x'
end
__END__
#0	101221102	BEDGHIFEH
#1	000000000	BEH