November Challenge 2016
Chef and squares, Task for Alexey, Count Permutations
October Challenge 2017
Chef and a great voluntary Program, Max Mex, Counter Test For CHEFSUM, A Balanced Contest
November Challenge 2017
Periodic Palindrome Construction, Villages and Tribes, Chef goes Left Right Left
IOPC 2017 (Rated)
The Birthday Tears, Max Out
January Lunchtime 2018
Chef and Game with Sequence, Chef and Escaping from the Labyrinth
February Challenge 2018
Broken Clock, Permutation and Palindrome, Car-pal Tunnel, Chef And The Patents, Chef And His Characters
February Cook-Off 2018
Chef and Cook-Off, Chef and Tuples, Chef and Line
March Challenge 2018 DIV 1
Chef and Easy Problem, Mix the Colors, Minions and Voting
September Mega Cook-Off 2018 Division 1
OneTwo, Make a Permutation
May Challenge 2018 Division 1
Change the Signs, Fake Binary Search, Dibs on Fibs
India