November Challenge 2014
Chef and Segment Game, The Spelling Problem, Let us construct palindrome, Distinct Characters Subsequence, Chef and Red Black Tree
September Challenge 2015
Chain of Doughnuts, Nikitosh and xor, Count Steps in Matrix, Terrible vectors, Bank robbery, Lighthouses, Cracking the Code, Chef and Chetris
October Challenge 2015
Time measure, Rupsa and Equilateral Triangle, Spheres, Who dares to be a millionaire, Count Subarrays
October Cook-Off 2015
Word Stem, Almost Sorted Permutation
September Lunchtime 2015
Sum of palindromic numbers
February Challenge 2016
Matrix Maximum Sum, Chef-Detective, Rectangles of Love, Chef and Strange Operations, Sereja and Two Lines, Chef and Job and Rest, Devu and a light discussion
August Challenge 2016
Chef and Round Run, A Good Problem, Maximum Grid, Funny gnomes, Chef and Chocolate, Chef and Circle Run, Fighting Ebola, Chef and His Garden
November Challenge 2016
Friends Meeting, Task for Alexey, Sereja and Ways in the Cube, Chef and squares, Kirito in Memeland, Gift and Chef, Urban Development, Count Permutations
February Cook-Off 2016
Puppy and Catchers, Puppy and Board, Puppy and Sum
September Cook-Off 2016
Lazy Jem, The Lost Arithmetic Sequences, Counting Strings, Find The Point
India