June Challenge 2017
Chef and the Feast, Xenny and Coin Rankings, Triplets, Pairwise union of sets, A Good Set
July Challenge 2017
Chef and Sign Sequences, Pishty and tree, Tree Expectancy, Whats in the Name, Calculator , IPC Trainers
July Cook-Off 2017
Chang and the Perfect Function, Chang and Perfect Quadruples, Chang and Bitwise OR
June Lunchtime 2017
Maximum Unique Segment, Two Numbers
January Challenge 2018
K-Concatenation, Maximum Score, Rectangle, String Merging, Partition the numbers
January Cook-Off 2018
Multiple of 3, Make array great again, Survive in ChocoLand
January Lunchtime 2018
Chef and Game with Sequence, Chef and Escaping from the Labyrinth
United States