October Long Contest 2011
The Great Plain, The Baking Business, Repeated String, Lucky Palin, Dish Distribution
September Cook-off
Last Digit Sum, Digit Rotation, Hotel Bytelandia
October Cook-off
Generalized Arithmetic Progression Free Sequence, Chef Travel Routes
February 2012 Challenge
Lucky Long, Count of Maximum
June Challenge 2012
Little Elephant and Candies
February Cook-Off 2013
Lack of Logic, Row and Column Operations
June Challenge 2015
Steady tables, Chef and His Friend, Chef and Memory Limit, Chef and Polygons
Russia