June Cook-Off 2019 Division 2
Ants and Anteaters, Eat Twice, Drink Slush, Multiple Choice Exam
June Lunchtime 2019 Division 2
Ping Paja Pong, Magda and Silly Pairs
July Challenge 2019 Division 2
Guess the Prime!, Parity Again, Minimum and Maximum, Chef and Mean
August Challenge 2019 Division 1
Guddu and his Mother, Maximize an Expression, Dilemma
September Lunchtime 2019 Division 1
All Substrings, Find the Sum
November Challenge 2019 Division 1
Smallest Beautiful Number
March Cook-Off 2021 Division 2
Consecutive Deletions, Matrix XOR, Guess the Number
April Cook-Off 2021 Division 2
OR of ANDs, Chocolate Monger
South Korea