June Challenge 2015
Chef and His Friend, Chef and Memory Limit, Chef and Polygons, Steady tables
May Challenge 2018 Division 2
Xor Again, Dibs on Fibs, Fake Binary Search, Minimum Deletions, Change the Signs, Mighty Friend
December Challenge 2018 Division 2
Max and Electrical Panel, Chef and Interactive XOR, Chef and Meatballs, Chef and Interactive Contests, Chef and An Ideal Problem
