December Challenge 2012
Granama Recipes, Sereja and Data Structures , WordNinjas, Pizza Delivery, Magic Rankings, Book Exercises, The Uncountable Ways
January Challenge 2013
Little Elephant and Alcohol, Dividing Products, The Minimum Number Of Moves, End Of The World, A Fence for Byteland, Chef of the Year, Three Different Numbers
February 2013 Challenge
Buy1-Get1, Climbing Stairs, Little Elephant and Cards
April Challenge 2013
Little Elephant and Music, Barcelona Gameplay Tactics, ChefGame, Kingdom Unity, Fault Tolerance, Maximum Weight Difference, Levy Conjecture
May Challenge 2013
Field Trip, Your Name is Mine, Password Cracking Challenge, Witua and Math, Matchsticks, Name Reduction
August Challenge 2013
Little Elephant and Lemonade, Save The Princess, Chef and Segments, Splitting Candies
September Challenge 2013
Cool Guys, CAO Stage-2, CAO Stage-1, Project Spoon, Chef and Integers , Little Elephant and Exams
October Challenge 2013
Little Elephant and Bamboo, Kamehameha, Edit Distance on Grid, Yet Another Nice Girl, Sereja and Transformation, Maxim and Dividers, Helping Lira
March Cook-Off 2015
How to Minimize a String, How to Write a Message, How to Repaint a Fence
April Cook-Off 2016
Movie Weekend, Odd Divisors, Queries on a Binary Tree
Germany