November Challenge 2017
Chef goes Left Right Left, Villages and Tribes, Periodic Palindrome Construction
December Cook-Off 2017
Beautiful Array, Football Match
October Lunchtime 2017
Buggy Calculator, Maximum Number
January Lunchtime 2018
Chef and Game with Sequence
February Cook-Off 2018
Chef and Cook-Off, Chef and Tuples
September Mega Cook-Off 2018 Division 2
OneTwo, Make a Permutation, ATM Machine
May Challenge 2018 Division 2
Minimum Deletions, Xor Again
December Challenge 2018 Division 2
Chef and Interactive Contests, Chef and An Ideal Problem
October Challenge 2018 Division 2
Chef and Serves, Byte to Bit
October Lunchtime 2018 Division 2
Coloring the Grid, Three Friends
January Challenge 2019 Division 2
Yet Another Problem About Sequences, Different Neighbours, Lucky Number Game, Distinct Pairs, Chef and Modulo Game, Fancy Quotes
February Challenge 2019 Division 1
Chef and Secret Ingredients, Art of Balance
February Cook-Off 2019 Division 2
Buying New Tablet, Chef and Party, Max Range Queries
March Challenge 2019 Division 2
Chef and Number Game, Chef and a Beautiful Digit
August Challenge 2019 Division 2
Guddu and his Mother, Dilemma, Football, Distribute Apples, Zombie and the Caves
October Lunchtime 2019 Division 2
Khaled in HIT, Counting Inversions Revisited
November Challenge 2019 Division 2
Hard Sequence, Weapon Value
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