July Challenge 2017
Whats in the Name, Calculator , IPC Trainers, Chef and Sign Sequences
August Long Challenge 2017
Chef and Rainbow Array, Chef and Mover, Hill Jumping, Palindromic Game, Greedy Candidates, Strings and Graphs
April Challenge 2020 Division 2
Squared Subsequences, COVID Pandemic and Long Queue, Leaked Answers (Challenge), Sell All the Cars, Unit GCD, Ready Bitwise, Strange Number
February Challenge 2021 Division 2
Frog Sort, Team Name, Prime Game, Maximise Function
Mongolia