April Challenge 2019 Division 2
Maximum Remaining, Friend or Girlfriend
May Cook-Off 2019 Division 2
Chain Reaction, Misha and Nice Sets, Recover the Sequence
July Lunchtime 2019 Division 2
Delete a Subarray, Easy Math, Swapping
April Lunchtime 2020 Division 2
Another Birthday Present!, Positive Mex, Chef in Fantasy League
July Cook-Off 2020 Division 1
Even-tual Reduction, OR-thodox Distinction
November Cook-Off 2020 Division 1
Flip the String, Chef and IPC Certificates, Hiring Workers
October Lunchtime 2020 Division 2
AND Plus OR, Chef and Subtree MEXs, Chef Likes Good Sequences, Cute Chef Gift
February Lunchtime 2021 Division 1
Average Sorting, Sed Max, Independent Set
July Cook-Off 2021 Division 1
Beautiful Subsequence, Mod Equality, Hidden Colored Graph
Bangladesh