October Challenge 2013
Helping Lira, Maxim and Dividers, Sereja and Transformation, CAO Stage-3, Yet Another Nice Girl, Kamehameha, Little Elephant and Bamboo
November Challenge 2013
Uncle Johny, Missing some chairs, Square Digit Squares, Yet Another Cute Girl, Superpowers of 2, Chef Game
March Challenge 2015
Count Substrings, Chef and Notebooks, Chef and Problems, Sereja and Random Array, Devu and his Class, Sign Wave, Matrix
