June Challenge 2014
Chef and Subarray, Guessing Game
July Challenge 2014
Chef and Frogs, Chef and Rectangle Genome, Count Substrings, Reach The Point
August Challenge 2014
The Leaking Robot, Chef and Gift
October Challenge 2014
Chef and Ground, Magical Girl and Colored Liquid Potions, DevuLand, Dinosaurs and Laddus
January Challenge 2015
Gcd Queries, One Dimensional Kingdoms, Sereja and Votes, Chef and A Large Permutation, Sereja and Number Division 2, Chef and Stones
February Challenge 2015
Chef and Chain, Chef and Strange Formula, Let us play with rank list, Chef and Equality
August Challenge 2015
Way Out, Gravity Guy, Cooking Machine, Aditi and Magic Trick
November Challenge 2015
Eugene and function, Chef and cakes
July Challenge 2016
Andrash and Stipendium, Chef and Tetris, Chef and Robots Competition, Chefland and Electricity
August Lunchtime 2016
Studying Alphabet, Lock-Free Stack
India