April Challenge 2020 Division 2
Strange Number, Sell All the Cars, COVID Pandemic and Long Queue
July Challenge 2020 Division 2
Chef and Card Game, Chef and Strings, Doctor Chef, Missing a Point, Chef and Dragon Dens, Chefina and Swaps, Ada King
August Challenge 2020 Division 2
Subsequence Frequency Counting, Chef Wars - Return of the Jedi, Another Card Game Problem, Chef and Linear Chess, Smallest KMP, Chef and Wedding Arrangements
September Challenge 2020 Division 2
Ada Matrix, Divide Candies, Find XOR, A Problem on Sticks, Chefina and Swap, Chef and Trump Cards
July Lunchtime 2020 Division 2
Chef and Steps, Maximum Candies
August Cook-Off 2020 Division 2
Polygon Relationship, Chef and Work
October Challenge 2020 Division 2
Adding Squares, Chef and Easy Queries, Covid Run, D-Dimensional MST, Replace for X, Positive AND
January Challenge 2021 Division 2
Chef and Ants, Guess the Tiling, Expected Number of SCCs, Watching CPL, Fair Elections
December Challenge 2020 Division 1
Hail XOR, String Operations, Positive Prefixes, Even Pair Sum
India