April Challenge 2016
Chef and Ballons, Chef And Magical Path, Chef And Coloring, Help Watson Escape
March Challenge 2019 Division 2
(Challenge) Interleaving Strings, Chef and a Beautiful Digit, Yet Again a Subarray Problem, Chef and Number Game, Cheating on Queue, Chef got Recipes, Chef and Soccer
April Challenge 2019 Division 2
Kira Loves Palindromes, Playing with Numbers, Friend or Girlfriend, Maximum Remaining, Subtree Removal, Fencing, Moving Rectangles (Challenge)
May Challenge 2019 Division 1
Ada Rooks 2, Where to Build the Roads
May Lunchtime 2019 Division 1 (Unrated)
Grid Tour, Reverse Maximisation, Abdullah and Toll Discounts
United States