November Challenge 2014
Distinct Characters Subsequence
February Challenge 2015
Chef and Chain, Chef and Equality
April Challenge 2015
Chef and Interview, Broken Telephone
August Challenge 2015
Gravity Guy, Cooking Machine
September Challenge 2015
Count Steps in Matrix, Chain of Doughnuts
June Challenge 2016
Chef And Binary Operation, Devu and an Array
July Challenge 2016
Andrash and Stipendium, Chefland and Electricity
November Challenge 2016
Count Permutations, Chef and squares, Task for Alexey
India