February Challenge 2018
Chef And The Patents, Chef And His Characters, Permutation and Palindrome, Car-pal Tunnel, Points Inside A Polygon
February Cook-Off 2018
Chef and Cook-Off, Chef and Line
March Challenge 2018 DIV 2
Chef and Easy Problem, A Big Sale, Mix the Colors, Chef and Glove, Minions and Voting, Minion Chef and Bananas
March Cook-off 2018 Division 2
Chef Goes to the Cinema, Chef Restores a Matrix, Chef Judges a Competition
April Challenge 2018 Division 1
Chef and Array (Challenge), Cutting Plants, Highway Crossing, Count Good Prefixes
July Challenge 2018 Division 2
Gears, No Strings Attached, Strike or Spare, Magic Set, No Minimum No Maximum, Reach Equilibrium
August Challenge 2018 Division 1
Coordinate Compression , Modular GCD
June Lunchtime 2018 Division 2
Summary Power, Counting Pretty Numbers
United States