January Challenge 2014
Sereja and Graph, Counting D-sets, ForbiddenSum, Meteor, Bon Appetit, Please like me, Chef and Feedback, Magic Trick
February Challenge 2014
Chef and Favourite Sequence, Colored Array, Little Elephant and Subarrays, Longest Common Pattern, Make Him Happy
May Challenge 2014
Compilers and Parsers, Stone, Chef and Strange Matrix, Sereja and Subsegment Increasings, Fun with AGp, Chef-jumping, Sereja and Game, Little Elephant and Balloons
June Challenge 2014
Little Elephant and Blocks, Maxim and Progressions, Chef and Digit Jumps, Chef and Subarray, Sereja and Arcs, Guessing Game
October Challenge 2014
Sereja and two strings, DevuLand, Dinosaurs and Laddus, Magical Girl and Colored Liquid Potions, Union on Tree, Chef and Square, Chef and Ground, Remy paints the fence, Children Trips
January Challenge 2015
Queries on the String, Chef and A Large Permutation, Sereja and LCM, Chef and Stones, Sereja and Votes, One Dimensional Kingdoms, Xor Queries, Gcd Queries
January Long Challenge 2016
Chef and Inflation, Devu and Perfume, Chef and Time Machine, Dai Ma Chu Shi, Cyclist Race, Churu and Balls, Rupsa and the Game, Sereja and Salesman
February Challenge 2016
Rectangles of Love, Chef-Detective
February Challenge 2021 Division 2
Frog Sort, Team Name, Prime Game, Multiple Games, Maximise Function
