July Challenge 2020 Division 2
Chefina and Swaps, Missing a Point, Chef and Card Game, Chef and Strings, Ada King
August Challenge 2020 Division 2
Chef and Wedding Arrangements, Smallest KMP, Chef and Linear Chess, Another Card Game Problem, Chef Wars - Return of the Jedi
September Challenge 2020 Division 2
Chefina and Swap, A Problem on Sticks, Ada Matrix
December Challenge 2020 Division 2
Positive Prefixes, Even Pair Sum, Vaccine Production, Vaccine Distribution
India