December Challenge 2017
Penalty Shoot-out, Chef And his Cake
November Cook-Off 2017
Online Chess, Random Pair
January Challenge 2018
K-Concatenation, Maximum Score, Rectangle, String Merging, Partition the numbers
January Lunchtime 2018
Chef and Game with Sequence
February Challenge 2018
Chef And His Characters, Chef And The Patents, Car-pal Tunnel, Permutation and Palindrome
June Challenge 2019 Division 2
Road Signs, Chef and Proxy
May Challenge 2020 Division 2
Coronavirus Spread, Chef and Bitwise Product, Isolation Centers
India