June Challenge 2014
Guessing Game, Forgot Password, Chef and Subarray
October Challenge 2014
Remy paints the fence, Chef and Ground, Magical Girl and Colored Liquid Potions, DevuLand, Dinosaurs and Laddus
November Challenge 2014
Distinct Characters Subsequence
December Challenge 2014
Chef and Apple Trees, XOR with Subset
September Challenge 2017
Sereja and Commands, Chef and Pick Digit, Minimum Good Permutation, Little Chef and Sums
March Challenge 2018 DIV 2
Pishty and Triangles, Minion Chef and Bananas, Minions and Voting, Chef and Glove, Mix the Colors, A Big Sale, Chef and Easy Problem
April Challenge 2018 Division 1
Cutting Plants, Highway Crossing, Count Good Prefixes
February Challenge 2019 Division 1
Manhattan Rectangle, Guess It Right, Chef and Secret Ingredients, Art of Balance
China