December Challenge 2017
Chef And his Cake, Penalty Shoot-out, Chef and Hamming Distance of arrays, Total Diamonds
November Cook-Off 2017
Skiing, Online Chess, Random Pair
November Challenge 2018 Division 2
Good Median, Chef and Happiness, Chef and Difficult Contests, Magician versus Chef 2, Chef, Primes and Trees (Challenge), Appy Loves One, Chef and Ridges
January Challenge 2019 Division 1
Yet Another Problem About Sequences, Different Neighbours, Distinct Pairs, A Pizza Slice
United States