September Challenge 2017
Chef and Pick Digit, Minimum Good Permutation, Fill The Matrix, Little Chef and Sums, Sereja and Commands
April Challenge 2018 Division 2
Weight of Numbers, Count Good Prefixes, Average of Pairs, Workers
May Challenge 2018 Division 2
Mighty Friend, Minimum Deletions, Xor Again, Dibs on Fibs
July Challenge 2018 Division 2
Strike or Spare, No Strings Attached, Magic Set, No Minimum No Maximum
January Challenge 2019 Division 2
Yet Another Problem About Sequences, Different Neighbours, Lucky Number Game, Distinct Pairs, Chef and Modulo Game, Fancy Quotes, (Challenge) Chef and Matching Game, A Pizza Slice
February Cook-Off 2019 Division 1
Max Range Queries, Chef and Secret Password, Chef and Party
April Challenge 2019 Division 1
Playing with Numbers, Subtree Removal
