January Challenge 2013
The Minimum Number Of Moves, End Of The World, Chef of the Year, Three Different Numbers, Little Elephant and Alcohol
January Cook-Off 2013
Minimum Distance, Many Chefs
February 2013 Challenge
Little Elephant and Cards, Buy1-Get1, Triangular Queries, Climbing Stairs, Efficient Painting
May Challenge 2017
Gotham PD, Chef and Subsequences, Median of adjacent maximum numbers, Blocked websites, Courses in an university, Chef and his daily routine, Long Sandwich , Chef and Sub Array
June Challenge 2017
Chef and Prime Queries, A Good Set, Cloning, Chef and the Feast, Xenny and Coin Rankings, Triplets, Pairwise union of sets
Vietnam