August Long Challenge 2017
Chef and Mover, Palindromic Game, Greedy Candidates, Chef and Rainbow Array
September Challenge 2017
Sereja and Commands, Chef and Pick Digit, Minimum Good Permutation, Fill The Matrix, Little Chef and Sums
November Challenge 2017
Periodic Palindrome Construction, Villages and Tribes, Chef goes Left Right Left, Chef Hates Palindromes
December Challenge 2017
Total Diamonds, Chef And his Cake, Penalty Shoot-out, Chef and Hamming Distance of arrays
August Cook-Off 2017
Real obtuse, From heaven to earth
January Challenge 2018
Partition the numbers, String Merging, Maximum Score, K-Concatenation, Rectangle
January Cook-Off 2018
Multiple of 3, Survive in ChocoLand
February Challenge 2018
Broken Clock, Chef And His Characters, Chef And The Patents, Car-pal Tunnel, Permutation and Palindrome
February Cook-Off 2018
Chef and Cook-Off, Chef and Tuples, Chef and Line
March Challenge 2018 DIV 1
Chef and Easy Problem, Minions and Voting, Mix the Colors, Chef and Gcd Queries
June Cook-Off 2018 Division 2
Archi and Comparsion, Good Permutations
July Challenge 2018 Division 1
Reach Equilibrium, No Minimum No Maximum, Gears
April Challenge 2019 Division 1
Offer for Chef, Kira Loves Palindromes, Playing with Numbers, Subtree Removal
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