AIZU ONLINE JUDGE: Programming Challenge 0051 Differential II $<.readlines.drop(1).map {|a| a.chomp.chars.map(&:to_i).sort}.each do |ary| puts ary.reverse.join.to_i - ary.join.to_i end 0052 Factorial II until (n = $<.gets.to_i).zero? five …