November Challenge 2014
The Spelling Problem, Let us construct palindrome, Chef and Red Black Tree, Distinct Characters Subsequence, Sereja and Permutations, Chef and Segment Game
January Challenge 2015
Chef and Stones, One Dimensional Kingdoms
October Cook-Off 2015
Word Stem, Almost Sorted Permutation
January Long Challenge 2016
Rupsa and the Game, Devu and Perfume, Churu and Balls
February Challenge 2016
Chef and Strange Operations, Chef-Detective
March Challenge 2016
Palindromic substrings, maximize the sum
July Challenge 2016
Andrash and Stipendium, Chef and Segments, Chef and Tetris, Chef and Robots Competition, Chefland and Electricity
September Challenge 2016
Chef and digits of a number, Chef and calculation, Faded Palindromes
November Challenge 2020 Division 2
Restore Sequence, Ada and Dishes, Magical Candy Store, Scalar Product Tree, Iron, Magnet and Wall
December Challenge 2020 Division 1
Hail XOR, Positive Prefixes, Even Pair Sum
November Cook-Off 2020 Division 1
Flip the String, Chef and IPC Certificates, Hiring Workers
June Challenge 2021 Division 2 (Unrated)
Shortest Route, Minimum Subtree Cover, Summer Heat, Dual Distance, Bella ciao, Bitwise Tuples, Minimum Dual Area
SnackDown 2021 - Online Qualifiers
Prefix as a Substring 2, Lucky Number, Maximum Number Of Distinct Elements
SnackDown 2021 - Online Round 1A
Yet Another Flipping Problem, Round Robin Ranks , Dance Moves, Min Max LCM
