October Challenge 2017
A Balanced Contest, Max Mex
November Challenge 2017
Chef Hates Palindromes, Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes
December Challenge 2017
Santa Delivering Problem, Chef And his Cake, Chef And Easy Xor Queries, Penalty Shoot-out, Chef and Hamming Distance of arrays
January Challenge 2018
Maximum Score, Partition the numbers, Rectangle, K-Concatenation
February Challenge 2018
Chef And His Characters, Chef And The Patents, Akanksha and End of Semester, Points Inside A Polygon, Car-pal Tunnel, Permutation and Palindrome
March Challenge 2018 DIV 1
Chef and Easy Problem, Mix the Colors, Minions and Voting
April Challenge 2018 Division 1
Chef and Array (Challenge), Count Good Prefixes, Highway Crossing
May Challenge 2018 Division 1
Minimum Deletions, Fake Binary Search, Dibs on Fibs
December Challenge 2018 Division 1
(Challenge) Delete DAG, Max and Electrical Panel, Chef and Interactive XOR
October Challenge 2018 Division 1
Appy and Balloons , Minimize Digitsum, Chef and Surprise Chessboard
January Challenge 2019 Division 1
Distinct Pairs, A Pizza Slice, (Challenge) Chef and Matching Game, Partition the Graph, Different Neighbours, Yet Another Problem About Sequences
March Challenge 2019 Division 1
Yet Again a Subarray Problem, (Challenge) Interleaving Strings
August Challenge 2019 Division 1
Guddu and his Mother, Encoding, Dilemma, Maximize an Expression, Chef and Gordon Ramsay, Football, Distribute Apples, Zombie and the Caves
India