August Long Challenge 2017
Chef and Mover, Chef and Rainbow Array, Greedy Candidates
September Challenge 2017
Chef and Pick Digit, Minimum Good Permutation, Little Chef and Sums
October Challenge 2017
Max Mex, Counter Test For CHEFSUM, A Balanced Contest
November Challenge 2017
Periodic Palindrome Construction, Villages and Tribes, Chef goes Left Right Left, Chef Hates Palindromes
December Challenge 2017
Chef And his Cake, Penalty Shoot-out, Chef and Hamming Distance of arrays
September Cook-Off 2017
Statistics Construction, Subsequence Equality
October Cook-Off 2017
Chef and Weird Queries, Chef and Employment Test
December Cook-Off 2017
Beautiful Array, Football Match
September Lunchtime 2017
Chef and Cook-Off Contests
January Challenge 2018
Partition the numbers, String Merging, Rectangle, Maximum Score, K-Concatenation
January Lunchtime 2018
Chef and Game with Sequence
February Challenge 2018
Chef And His Characters, Chef And The Patents, Car-pal Tunnel, Permutation and Palindrome
March Challenge 2018 DIV 1
Chef and Easy Problem, Mix the Colors, Minions and Voting
March Cook-off 2018 Division 1
Chef Goes to the Cinema, Chef Restores a Matrix
India