May Challenge 2020 Division 2
Isolation Centers, Coronavirus Spread
May Lunchtime 2020 Division 2
Lost Weekends, Weird Walk
June Challenge 2020 Division 2
Even Matrix, The Tom and Jerry Game!, Chef and Icecream, Chef and String, Chef and Price Control
July Challenge 2020 Division 2
Chef and Card Game, Chef and Strings, Missing a Point, Ada King
August Challenge 2020 Division 2
Chef Wars - Return of the Jedi, Another Card Game Problem, Chef and Linear Chess, Smallest KMP, Chef and Wedding Arrangements
September Challenge 2020 Division 1
Chefina and Swap, Ada Matrix
July Cook-Off 2020 Division 2
Even-tual Reduction, OR-thodox Distinction
July Lunchtime 2020 Division 2
Chef and Steps, Maximum Candies
January Challenge 2021 Division 2
Chef and Ants, Watching CPL, Fair Elections
December Challenge 2020 Division 2
Vaccine Production, Vaccine Distribution, Even Pair Sum, Positive Prefixes, Hail XOR
Code Ensemble (Rated for Division 2)
Cherry and Bits, Priya and AND, Help Martha
UWCOI 2021 (Rated for all)
Array Swaps, Hidden Numbers
India