December Challenge 2013
Chef and Codes, Funny Marbles, Magic Pairs, Reign, Rectangular Queries, Cube Cakes
January Challenge 2014
Magic Trick, Sereja and Graph, Counting D-sets, ForbiddenSum, Meteor, Bon Appetit, Please like me, Chef and Feedback
December Cook-Off 2014
Servers, Matrix Again, Player, Good Joke!
February Challenge 2014
Little Elephant and Movies, Draughts, Make Him Happy, Chef and Favourite Sequence, Longest Common Pattern, Little Elephant and Subarrays, Colored Array
May Challenge 2014
Compilers and Parsers, Stone, Chef-jumping, Chef and Strange Matrix
July Challenge 2014
Garden Game, Chef and Frogs, Count Substrings, Reach The Point, Dish Owner
August Challenge 2014
Chef and Reversing, The Leaking Robot, Chef and Gift
January Lunchtime 2014
Chef and Numbers, Chef and Way, Chef and String, Chef and Shop
January Challenge 2015
Chef and Stones, Sereja and Votes, One Dimensional Kingdoms, Gcd Queries
June Challenge 2015
Steady tables, Chef and His Friend, Chef and Memory Limit, Chef and Polygons
November Challenge 2020 Division 1
Chef and the Combination Lock, Restore Sequence
United States