Accept 20 answers given by other contributors
Awarded to Andrei Bobrov on 29 Mar 2019
Contribute at least one answer each month for 36 consecutive months
Awarded to Andrei Bobrov on 20 Jul 2017
Answer 3 questions that were unanswered for more than 30 days
Awarded to Andrei Bobrov on 20 Jul 2017
100 of your answers have been accepted
Awarded to Andrei Bobrov on 20 Jul 2017
Provide your first answer ever to someone else's question
Awarded to Andrei Bobrov on 20 Jul 2017
15-year anniversary Scavenger Hunt finisher badge
Awarded to Andrei Bobrov on 09 Nov 2016
Solve all the problems in CUP Challenge
Awarded to Andrei Bobrov on 18 Dec 2014
Comment on a problem or solution
Awarded to Andrei Bobrov on 22 Nov 2012
Solve a problem with a best solution
Awarded to Andrei Bobrov on 03 Oct 2012
Be the first to solve a problem
Awarded to Andrei Bobrov on 03 Aug 2012
Solve a problem for the first time
Awarded to Andrei Bobrov on 23 May 2012
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