June Challenge 2018 Division 2
Vision, Sheokand and String, Binary Shuffle, Naive Chef, Two Flowers
August Challenge 2018 Division 2
Sheokand and Number, Spell Bob, Problem Sort, Modular GCD, Coordinate Compression
September Challenge 2018 Division 1
AND Square Subsegments, Sasha and Photos, Table Game, Bad Shuffle
December Challenge 2018 Division 1
Colorblind Feast, Chef and Interactive XOR, Edge Addition, Directing Edges, Max and Electrical Panel
October Challenge 2018 Division 1
Appy and Balloons , Beautiful Bricks, Minimize Digitsum, Chef and Surprise Chessboard
January Challenge 2019 Division 1
Yet Another Problem About Sequences, Different Neighbours, Partition the Graph, Distinct Pairs, Party
Vietnam