July Challenge 2017
Whats in the Name, Chef and Sign Sequences, Calculator
September Mega Cook-Off 2018 Division 2
ATM Machine, Make a Permutation
September Challenge 2018 Division 2
AND Square Subsegments, Sasha and Photos, Magician versus Chef, War of XORs, Chef and Condition Zero (Challenge), Chef and Adventures, Table Game, Bad Shuffle
December Challenge 2018 Division 1
Chef and Interactive XOR, Directing Edges, Max and Electrical Panel
November Challenge 2018 Division 1
Appy Loves One, Good Median, Chef, Primes and Trees (Challenge), Magician versus Chef 2
October Challenge 2018 Division 2
Appy and Balloons , Beautiful Bricks, Minimize Digitsum, Chef and Surprise Chessboard, Chef and Serves, Byte to Bit, Chef and Circles
February Cook-Off 2019 Division 1
Max Range Queries, Chef and Secret Password, Chef and Party
April Challenge 2019 Division 1
Offer for Chef, Kira Loves Palindromes, Mininum XOR over Tree, Playing with Numbers, Subtree Removal, Moving Rectangles (Challenge)
September Challenge 2019 Division 1
Fuzzy Linear Combinations, Chef Designed a Network
September Lunchtime 2019 Division 1
Treeversion, Find the Sum, All Substrings
October Challenge 2019 Division 1
Even Edges, Chef and Maximum Star Value, Array Modification, (Challenge) Maximizing LIS
Alkhwarizm (Rated for all)
Weirwood Trees, Danny Wants To Know
April Challenge 2020 Division 1
Strange Number, Squared Subsequences, Perfect Power Divisors, Ready Bitwise, Factor Tree, Leaked Answers (Challenge)
India