August Challenge 2016
Chef and Chocolate, Chef and Round Run, Chef and His Garden
May Challenge 2017
Chef and Subsequences, Chef and Battleship, Median of adjacent maximum numbers, Blocked websites, Courses in an university, Chef and his daily routine, Gotham PD, Long Sandwich , Chef and Sub Array
June Challenge 2017
Chef and Prime Queries, A Good Set, Chef and the Feast, Xenny and Coin Rankings, Triplets, Pairwise union of sets
July Challenge 2017
Chef and Sign Sequences, IPC Trainers, Calculator , Whats in the Name, Tree Expectancy, Pishty and tree
July Cook-Off 2017
Chang and Bitwise OR, Chang and the Perfect Function, Chang and Perfect Quadruples, Bipartite Graph from Trees
March Cook-off 2018 Division 1
Chef Goes to the Cinema, Chef Restores an Array, Chef Restores a Matrix
July Lunchtime 2018 Division 1
Forced Particles, GCD Sum, Prime divisors
November Lunchtime 2018 Division 1
Useful Number, Beats and Pieces
Russia