May Challenge 2019 Division 2
Binary Movements, Matches, Trees and Degrees, Reduce to One, Where to Build the Roads, Ada Rooks 2
July Challenge 2019 Division 2
Hit the Coconuts, Guess the Prime!, Parity Again, Codechef War, Circular Merging, Minimum and Maximum, Chef and Mean
November Challenge 2019 Division 1
Physical Exercise, (Challenge) Coloring Triangulations, Winning Ways, Single Point of Failure, From Zero to Infinity, Smallest Beautiful Number
December Challenge 2019 Division 1
Chefina and Ranges, Binary XOR, Binomial Fever, Scoring Pairs, Sticky Notes, Test Generation, Addition
