November Challenge 2017
Chef Hates Palindromes, Polynomials, Chef and Subarray Queries, Chef goes Left Right Left, Lovers Gift, Periodic Palindrome Construction, Villages and Tribes, Product on the segment by modulo
December Challenge 2017
Total Diamonds, Chef And his Cake, Chef And Easy Xor Queries, Penalty Shoot-out, Chef and Hamming Distance of arrays
January Challenge 2018
String Merging, Partition the numbers, Rectangle, K-Concatenation, Simplify the Square Root, Killing Monsters, Maximum Score
February Challenge 2018
Points Inside A Polygon, Permutation and Palindrome, Car-pal Tunnel, Chef and odd queries, Akanksha and End of Semester, Chef And The Patents, Chef And His Characters, Chef And Land Labeling, Broken Clock
March Challenge 2018 DIV 1
Pishty and Triangles, Chef and Easy Problem, Chef and Gcd Queries, Mix the Colors, Minions and Voting
May Challenge 2018 Division 1
Fake Binary Search, Dibs on Fibs
United States