February 2012 Cook-off
Daily Train, Careful Calculation
March 2012 Challenge
Tom And Jerry, Longest Weird Subsequence, Cosine Partition Function, Evil Book, Lucky Number, Free Shuttle Service, Home Delivery, Spoon in Matrix, Xor it
March Cook-Off 2012
Ciel Numbers I, Ciel Numbers II
August Challenge 2012
Little Elephant and Bombs, Lucky Driving, Range of Data, Delivery Boy
February Challenge 2017
Chef and Yoda, Interval Game, Chef and Triangles, Chef and His Apartment Dues, Gerrymander
