August Long Challenge 2017
Chef and Mover, Chef and Rainbow Array, Greedy Candidates
November Challenge 2017
Chef Hates Palindromes, Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes
January Challenge 2018
K-Concatenation, Maximum Score, Rectangle, String Merging, Partition the numbers
February Challenge 2019 Division 2
Chef and Magical Jars, Chef and Secret Ingredients, Appy and Contest, Art of Balance, Deputy Chef
March Challenge 2019 Division 2
Chef and Number Game, Chef and a Beautiful Digit
April Challenge 2019 Division 2
Friend or Girlfriend, Maximum Remaining, Fencing
July Challenge 2019 Division 2
Minimum and Maximum, Chef and Mean
November Challenge 2019 Division 2
Hard Sequence, Weapon Value
December Challenge 2019 Division 2
Plus Multiply, That Is My Score!, Easy Subsequence Selection
December Lunchtime 2019 Division 2
The Evil Professor, Stupid Machine, Check Algorithm, Guess the number
January Challenge 2020 Division 1
Chef and Dynamo, Doraemon
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