January Challenge 2015
Chef and Stones, Chef and A Large Permutation, Sereja and Votes
September Challenge 2015
Chain of Doughnuts, Count Steps in Matrix
October Challenge 2015
Time measure, Who dares to be a millionaire
November Challenge 2015
Chef and collection of stamps, Chef and cakes, Simple Sum, Eugene and function
November Cook-Off 2015
Sereja and Line, Sereja and Array and Subtracting
January Long Challenge 2016
Devu and Perfume, Chef and Time Machine, Rupsa and the Game, Churu and Balls
March Challenge 2016
Palindromic substrings, maximize the sum
April Challenge 2016
Help Watson Escape, Chef and Ballons, Chef And Magical Path, Chef And Coloring
November Challenge 2016
Count Permutations, Task for Alexey, Chef and squares, Gift and Chef
March Cook-Off 2016
Digital clock, Dual Nim, Alternating subarray prefix
India