Fri, 20 Jan 2017 17:22:54 +0100 wenzelm tuned;
Fri, 20 Jan 2017 12:44:44 +0100 nipkow added postorder
Fri, 20 Jan 2017 08:49:06 +0100 nipkow tuned
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -3 +3 +10 +30 +100 +300 +1000 +3000 +10000 tip