June Challenge 2017
Xenny and Coin Rankings, A Good Set
July Challenge 2017
Chef and Sign Sequences, Whats in the Name, Calculator
October Challenge 2017
Max Mex, A Balanced Contest
February Challenge 2018
Permutation and Palindrome, Car-pal Tunnel, Chef And His Characters, Chef And The Patents
March Challenge 2018 DIV 2
Pishty and Triangles, Chef and Easy Problem, A Big Sale, Mix the Colors, Chef and Glove, Minions and Voting, Minion Chef and Bananas
April Challenge 2018 Division 2
Weight of Numbers, Workers, Average of Pairs
October Challenge 2018 Division 2
Appy and Balloons , Minimize Digitsum, Chef and Surprise Chessboard, Chef and Serves, Byte to Bit, Chef and Circles
India