February Cook-Off 2019 Division 2
Buying New Tablet, Max Range Queries, Chef and Party
March Challenge 2019 Division 1
Chef and Soccer, Cheating on Queue, Treasure Hunt, Yet Again a Subarray Problem
Coders' Legacy 2019 (Rated for all)
Bathwater, IPL and RCB, Up for a Game
April Challenge 2019 Division 1
Playing with Numbers, Subtree Removal, Kira Loves Palindromes, Offer for Chef
April Lunchtime 2019 Division 1
Dream Problem, Firdavs and Planet F, Minimum Sum
May Challenge 2019 Division 1
Ada Rooks 2, Where to Build the Roads
June Challenge 2019 Division 1
Lent Money, Chef and Ingredients, Sum and GCD
August Challenge 2019 Division 1
Dilemma, Guddu and his Mother
September Challenge 2019 Division 1
Biladerim Icin, Fuzzy Linear Combinations, Chef Designed a Network
October Challenge 2019 Division 1
Even Edges, Bacterial Reproduction, Chef and Maximum Star Value, Array Modification
February Challenge 2020 Division 1
No Change Required, Long Contest and Cook Off Overlaps, (Challenge) Raisins, Hard Cash, School of Geometry, The Theatre Problem, Expected Change, Chef and Railway Stations
April Challenge 2020 Division 1
Strange Number, Squared Subsequences, Perfect Power Divisors, Ready Bitwise, Factor Tree, Leaked Answers (Challenge)
India