May Challenge 2019 Division 2
Reduce to One, Where to Build the Roads, Matches
July Challenge 2019 Division 2
Minimum and Maximum, Chef and Mean
August Challenge 2019 Division 2
Guddu and his Mother, Encoding, Dilemma, Football, Distribute Apples, Zombie and the Caves
September Challenge 2019 Division 1
Chef Designed a Network, Fuzzy Linear Combinations
October Challenge 2019 Division 1
Even Edges, Bacterial Reproduction, Chef and Maximum Star Value, Array Modification, (Challenge) Maximizing LIS, Operations on a Matrix
November Challenge 2019 Division 1
Physical Exercise, Smallest Beautiful Number, From Zero to Infinity
March Challenge 2020 Division 1
Chef and DAG, Lasers Everywhere, Lasers Everywhere Alternative
United States