第17回オフラインリアルタイムどう書くの問題をRubyで解く - Qiita

class Paper def initialize @tl = [:s] @tr = [:s] @bl = [:s] @br = [:s] end def r @tl += @tr @bl += @br @tr = @tr.map{|e| {:s=>:dv,:dv=>[:dv,:dv],:dh=>:f,:f=>[:f,:f]}[e]}.flatten @br = @br.map{|e| {:s=>:dv,:dv=>[:dv,:dv],:dh=>:f,:f=>[:f,:f]}[e]}.flatten end def l @tr += @tl @br += @bl @tl = @tl.map{|e| {:s=>:dv,:dv=>[:dv,:dv],:dh=>:f,:f=>[:f,:f]}[e]}.flatten @bl = @bl.map{|e| {:s=>:dv,:dv=>[:dv,:dv