August Long Contest 2011
Complex Spanning Tree, Infinite Grid Game
October Long Contest 2011
Dish Distribution, The Great Plain, Repeated String, Lucky Palin
October Cook-Off 2012
Buying Sweets, Equalization
July Challenge 2013
Chef and Walking on the rectangle , Sereja and Sorting, Count K-Primes
July Cook-off 2013
Chopsticks, A Plus B Again!
August Challenge 2013
Splitting Candies, Deleting numbers, Sereja and Ballons, Chef and Segments, Save The Princess, Hello Hello, Little Elephant and Lemonade, The Number Of Solutions
August Cook-Off 2013
Chef and The Right Triangles
September Challenge 2013
Little Elephant and Exams, Cool Guys, Chef and Integers , Project Spoon, CAO Stage-1, CAO Stage-2, Sereja and Snake
October Cook-Off 2013
Polo the Penguin and the Numbers, Polo the Penguin and the Test
October Challenge 2013
Little Elephant and Bamboo, Helping Lira, Maxim and Dividers, Sereja and Transformation, Yet Another Nice Girl
December Challenge 2013
Chef and Codes, Funny Marbles, Magic Pairs, Reign, Rectangular Queries
