March Challenge 2017
Xenny and Alternating Tasks, Bear and Extra Number, (CH) Bear and Sorted Rows, Bandwidth of a matrix, Cooking Schedule
December Cook-Off 2017
Minimum SubArray, Rotate Point, Beautiful Array, Football Match
January Challenge 2018
Partition the numbers, String Merging, Rectangle, Maximum Score, K-Concatenation, (Challenge) Chef and Palindromes
January Cook-Off 2018
Multiple of 3, Make array great again, Survive in ChocoLand
January Lunchtime 2018
Chef and Game with Sequence, Chef and Escaping from the Labyrinth
February Challenge 2018
Broken Clock, Chef And His Characters, Chef And The Patents, Car-pal Tunnel, Permutation and Palindrome
April Challenge 2018 Division 1
Chef and Array (Challenge), Count Good Prefixes, Highway Crossing, Vaibhav and Ministers, Cutting Plants
September Challenge 2018 Division 1
Sasha and Photos, Table Game, Bad Shuffle
Coders' Legacy 2018 (Rated)
Useless Clocks, Fibonacci String, Killing Zombies
December Lunchtime 2019 Division 1
Guess the number, Frequency Function, The Evil Professor, Stick and polygon
May Challenge 2020 Division 1
Triple Sort, Chef and Bitwise Product
March Cook-Off 2020 Division 1
Mysterious Sequence, A Tree to Remember, Maximize Letter Beauty, Random Chocolates, Escape the Tree
January Lunchtime 2020 Division 1
Minimum and Maximum, Construct Array, Under the Tunnels, Folding Paper
Georgia