August Challenge 2015
Gravity Guy, Cooking Machine
September Challenge 2015
Chain of Doughnuts, Count Steps in Matrix
October Challenge 2015
Who dares to be a millionaire
November Challenge 2015
Eugene and function, Chef and cakes
September Mega Cook-Off 2015
Forgotten Language, Stacks
October Cook-Off 2015
Almost Sorted Permutation
September Lunchtime 2015
Sum of palindromic numbers
March Challenge 2016
Palindromic substrings, maximize the sum
April Challenge 2016
Help Watson Escape, Chef and Ballons, Chef And Magical Path, Chef And Coloring
May Challenge 2016
Chef and Balls, Laddu, Forest Gathering, Chef and Big Soccer
June Challenge 2016
Chef And Binary Operation, Chef and Coins Game, Devu and an Array
September Challenge 2016
Chef and digits of a number, Faded Palindromes, Chef and calculation
October Challenge 2016
Chef and Three Dogs, Fenwick Iterations, Chef and Keyboard
November Challenge 2016
Count Permutations, Chef and squares, Task for Alexey
