December 2011 Long Contest
Robot Movings, Ciel and Eggs, Birthday Gift
January Challenge 2013
The Minimum Number Of Moves, Chef of the Year
February 2013 Challenge
Little Elephant and Cards, Buy1-Get1, Magic Board, Climbing Stairs
April Cook-Off 2013
Andrew and the Strings, Andrew and the Meatballs again, Andrew and the Balls, Andrew and the Meatballs
May Challenge 2013
Matchsticks, Witua and Math, Tree Counting, Name Reduction, Your Name is Mine, Field Trip
November Challenge 2013
Missing some chairs, Square Digit Squares, Uncle Johny, Yet Another Cute Girl, Superpowers of 2, Sereja and Vectors
May Challenge 2020 Division 1
Buying a New String, Triple Sort, Binary Land, Sorting Vases, Chef and Bitwise Product
May Cook-Off 2020 Division 1
Roads in Chefland, Chef, Chefina and Their Friendship
May Lunchtime 2020 Division 1
Absolute Min Max, Escape One, Convert the String, Tree difference
June Challenge 2020 Division 1
The Tom and Jerry Game!, Danya and Different Values, Covid Sampling (Challenge), Perfect Partitions, Guessing Game, Convenient Airports, The Delicious Cake, Operations on a Tuple
July Challenge 2020 Division 1
LCM Constraints, Chefina and Swaps, Chef and Dragon Dens, Missing a Point, Doctor Chef, Weird Product
