February Challenge 2017
Chef and His Apartment Dues
March Challenge 2017
Xenny and Alternating Tasks, Bear and Extra Number, Bandwidth of a matrix
April Challenge 2017
Similar Dishes, Bear and Row 01, Dish Of Life
June Challenge 2017
A Good Set, Chef and the Feast, Xenny and Coin Rankings
July Challenge 2017
Chef and Sign Sequences, Whats in the Name, Calculator
August Long Challenge 2017
Greedy Candidates, Palindromic Game, Chef And Fibonacci Array, Chef and Rainbow Array, Chef and Mover
October Challenge 2017
Chef and a great voluntary Program, Max Mex, A Balanced Contest
August Cook-Off 2017
Real obtuse, From heaven to earth
January Challenge 2018
Maximum Score, Rectangle, K-Concatenation
March Cook-off 2018 Division 2
Chef Goes to the Cinema, Chef Restores a Matrix, Chef Judges a Competition
May Cook-off 2018 Division 2
Best Cake Ever, Secret Recipe
May Challenge 2018 Division 2
Mighty Friend, Minimum Deletions, Xor Again, Dibs on Fibs
India