September Challenge 2016
Chef and digits of a number, Dividing Machine, Chef and calculation, Faded Palindromes, JosephLand
October Challenge 2016
Chef and Keyboard, Fenwick Iterations, Chef and Three Dogs, Chef and Two String
November Challenge 2016
Count Permutations, Friends Meeting, Urban Development, Gift and Chef, Chef and squares, Sereja and Ways in the Cube, Task for Alexey
December Challenge 2016
Train Partner, Our Base is Under Attack, Kirito in labyrinth
October Challenge 2017
Chef and Magic Arrays, Chef and a great voluntary Program, Chef and Cycled Cycles, Max Mex, Counter Test For CHEFSUM, A Balanced Contest
November Challenge 2017
Villages and Tribes, Periodic Palindrome Construction, Lovers Gift, Chef and Subarray Queries, Chef Hates Palindromes, Product on the segment by modulo , Chef and Intersection Line, Chef goes Left Right Left
December Challenge 2017
Total Diamonds, Chef And his Cake, Chef And Easy Xor Queries, Penalty Shoot-out, Chef and Hamming Distance of arrays
October Cook-Off 2017
Chef and Counting Test, Chef and Employment Test, Chef and Weird Queries, Chef and Dancing Steps
December Cook-Off 2017
Chef and Isomorphic Array, Football Match, Beautiful Array, Minimum SubArray
October Lunchtime 2017
Buggy Calculator, Maximum Number
December Lunchtime 2017
Days in Month, Strange Function, Too Much Sweetness, Four Friends
February Cook-Off 2018
Chef and Cook-Off, Chef and Tuples, Chef and Chefness, Chef and Line
Belarus