December Challenge 2018 Division 2
(Challenge) Delete DAG, Max and Electrical Panel, Chef and Interactive XOR, Chef and Meatballs, Chef and Interactive Contests, Chef and An Ideal Problem
November Challenge 2018 Division 2
Chef and Ridges, Appy Loves One, Magician versus Chef 2, Chef and Difficult Contests, Chef and Happiness
October Lunchtime 2018 Division 2
Three Friends, Coloring the Grid
January Challenge 2019 Division 1
Yet Another Problem About Sequences, Different Neighbours, Lucky Number Game, Distinct Pairs, Chef and Modulo Game, Fancy Quotes
February Challenge 2019 Division 1
Deputy Chef, Art of Balance, (Challenge) Chef with Orchestra in the Kitchen, Appy and Contest, Chef and Magical Jars, Guess It Right, Manhattan Rectangle, Chef and Secret Ingredients
March Challenge 2019 Division 1
Chef got Recipes, Chef and Number Game, Yet Again a Subarray Problem, Chef and a Beautiful Digit, (Challenge) Interleaving Strings
April Challenge 2019 Division 1
Playing with Numbers, Friend or Girlfriend, Maximum Remaining, Subtree Removal, Fencing
Starters 158 (Rated)
Largest Subsequence, XOR Smaller
Starters 159 (Rated)
Crafty Coloring (Easy), Super Hero, Chess Colouring, Elections
Starters 160 (Rated)
Buying Order (Easy), Equate S and T
Starters 162 (Rated)
Adjacent Sum Array, Permutation Mod K
Starters 163 (Rated)
Nice Array, Minimum Types, Sort Them
China