January Challenge 2015
Gcd Queries, Chef and Stones
February Challenge 2015
Chef and Chain, Let us play with rank list, Chef and Equality
July Challenge 2015
Bread, Na2a and lucky stone, Chef and Cube
August Challenge 2015
Gravity Guy, Aditi and Magic Trick, Cooking Machine
May Cook-Off 2015
Devu and friendship testing
March Challenge 2016
Palindromic substrings, maximize the sum
April Challenge 2016
Chef And Magical Path, Chef And Coloring, Chef and Ballons, Help Watson Escape
June Challenge 2017
A Good Set, Xenny and Coin Rankings
India