October Challenge 2015
Who dares to be a millionaire, Count Subarrays
February Challenge 2016
Chef and Strange Operations, Devu and a light discussion, Chef-Detective
March Challenge 2016
Palindromic substrings, maximize the sum
May Challenge 2016
Chef and Balls, Forest Gathering, Chef and Big Soccer, Laddu
November Challenge 2016
Gift and Chef, Task for Alexey, Chef and squares, Friends Meeting, Count Permutations
December Challenge 2016
Train Partner, Kirito in labyrinth, Our Base is Under Attack
January Cook-Off 2016
Chef and Destruction, Chef and Fruits
January Challenge 2017
Capital Movement, Cats and Dogs, Reservior, Tourists in Mancunia
February Lunchtime 2021 Division 2
Palpal Strings, Coprime Range
Kazakhstan