December Challenge 2014
Chef and Apple Trees, XOR with Subset
January Challenge 2015
Sereja and Votes, Gcd Queries, Chef and Stones
February Challenge 2015
Chef and Chain, Chef and Equality
June Challenge 2015
Steady tables, Chef and Memory Limit, Chef and Polygons
July Challenge 2015
Bread, Na2a and lucky stone, Chef and Cube
August Challenge 2015
Gravity Guy, Cooking Machine, Way Out
November Challenge 2015
Receipt Recovery, Eugene and function, Chef and cakes
May Challenge 2017
Chef and Sub Array , Chef and his daily routine, Courses in an university, Median of adjacent maximum numbers
March Challenge 2018 DIV 2
Minion Chef and Bananas, Minions and Voting, Chef and Glove, A Big Sale, Chef and Easy Problem, Mix the Colors
November Cook-Off 2018 Division 1
Beautiful Garland, A-B Game
April Challenge 2018 Division 1
Chef and Array (Challenge), Cutting Plants, Highway Crossing, Count Good Prefixes
May Challenge 2018 Division 1
Change the Signs, Fake Binary Search, Dibs on Fibs
December Challenge 2018 Division 1
Max and Electrical Panel, Chef and Interactive XOR
November Challenge 2018 Division 1
Appy Loves One, Chef, Primes and Trees (Challenge)
April Challenge 2019 Division 2
Kira Loves Palindromes, Playing with Numbers, Friend or Girlfriend, Maximum Remaining, Subtree Removal, Fencing
January Challenge 2020 Division 1
Chef and Dynamo, Doraemon
