February Challenge 2017
Chef and His Apartment Dues
April Challenge 2017
Bear and Row 01, Bear and Clique Distances, Similar Dishes, Dish Of Life
July Challenge 2017
Chef and Sign Sequences, Whats in the Name, Calculator , IPC Trainers
August Long Challenge 2017
Palindromic Game, Strings and Graphs, Greedy Candidates, Hill Jumping, Chef and Mover, Chef And Fibonacci Array, Chef and Rainbow Array
October Challenge 2017
Chef and Magic Arrays, Chef and a great voluntary Program, Max Mex, Counter Test For CHEFSUM, A Balanced Contest
December Challenge 2017
Chef and Hamming Distance of arrays, Red and blue points, Penalty Shoot-out, Chef And Easy Xor Queries, Total Diamonds, Chef and Universe, Chef And his Cake
July Cook-Off 2017
Chang and Bitwise OR, Chang and the Perfect Function
January Challenge 2018
K-Concatenation, Maximum Score, Rectangle, String Merging, Partition the numbers
February Challenge 2018
Chef And The Patents, Permutation and Palindrome, Car-pal Tunnel, Chef And His Characters, Broken Clock
August Cook-Off 2018 Division 1
GukiZ and Candies, Mixi Game
May Challenge 2018 Division 1
S-T Mincut, Change the Signs, Fake Binary Search, Dibs on Fibs
July Challenge 2018 Division 1
No Minimum No Maximum, Gears
December Challenge 2018 Division 1
Max and Electrical Panel, Chef and Interactive XOR
Brazil