July Challenge 2013
Chef and Walking on the rectangle , Count K-Primes, Circle of death
July Cook-off 2013
Chopsticks, Compressed String, A Plus B Again!
Lunch Time July 2013
Cooking dishes, Paying optimally
August Cook-Off 2013
Chef and The Right Triangles, Chef and The Divisibility Queries
August Lunchtime 2018 Division 1
Chef and Eid, Mix Mix Game, X and Two Groups, GukiZ Has More Candies
Russia