Thu, 07 Jun 2007 01:44:35 +0200 instance preal :: ordered_cancel_ab_semigroup_add
huffman [Thu, 07 Jun 2007 01:44:35 +0200] rev 23285
instance preal :: ordered_cancel_ab_semigroup_add
(0) -10000 -3000 -1000 -300 -100 -30 -10 -1 +1 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip