January Challenge 2015
Chef and A Large Permutation, Sereja and LCM, One Dimensional Kingdoms, Xor Queries, Queries on the String
February Challenge 2015
Xor Matrix, Chef and Equality, Let us play with rank list, Chef and Strings, Chef and Strange Formula, Time to Study Graphs with Chef, Chef and Chain
May Challenge 2015
Devu and his three Hands, Chef and Balanced Strings, Chef and Cake
November Challenge 2015
Eugene and function, Simple Sum, Chef and cakes
September Challenge 2016
Chef and Friends, Chef and calculation, Dividing Machine, JosephLand
May Challenge 2017
Median of adjacent maximum numbers, Chef and Subsequences, Blocked websites, Courses in an university, Chef and his daily routine, Gotham PD, Long Sandwich , Chef and Sub Array
May Cook-off 2018 Division 1
Difficult Choice, Best Cake Ever
April Challenge 2019 Division 1
Offer for Chef, Kira Loves Palindromes, Mininum XOR over Tree, Playing with Numbers, Subtree Removal
