June Challenge 2017
A Good Set, Chef and the Feast, Xenny and Coin Rankings, Triplets, Saboteur (Challenge)
December Challenge 2017
Chef and Universe, Total Diamonds, Chef And his Cake, Penalty Shoot-out
January Challenge 2018
Rectangle, Partition the numbers, String Merging, Maximum Score, K-Concatenation, Simplify the Square Root, A humongous Query, Killing Monsters, (Challenge) Chef and Palindromes, Killjee and k-th letter
February Challenge 2018
Chef And The Patents, Permutation and Palindrome, (Challenge) Biased Committee, Car-pal Tunnel, Points Inside A Polygon, Chef and odd queries, Chef And His Characters, Chef And Land Labeling, Lucas Theorem, Broken Clock
March Challenge 2018 DIV 1
Chef and Easy Problem, Mix the Colors, Minions and Voting
