John Katzenbach

@ddavidm1

Joined May 2012

World Rank: #16185 (2 points)

Activity over the last year

Effectiveness

 Problems solved
14
 Solutions submitted
22

Problems

List of solved classical problems:

ABCDEF RPLE
ALIEN RPLG
DICT RPLH
DISTO TEST
RPLB VERODOOM
RPLC WAGE
RPLD WPC4F