September Challenge 2015
Count Steps in Matrix, Chain of Doughnuts, Cracking the Code, Bank robbery
October Challenge 2015
Time measure, Count Subarrays, Who dares to be a millionaire
September Lunchtime 2015
Sum of palindromic numbers
February Challenge 2016
Chef and Strange Operations, Chef-Detective
March Challenge 2016
Palindromic substrings, maximize the sum
April Challenge 2016
Chef And Magical Path, Chef And Coloring, Chef and Ballons, Help Watson Escape
August Challenge 2016
Chef and Chocolate, Chef and Round Run
September Challenge 2016
Chef and Friends, Chef and digits of a number, Faded Palindromes, Chef and calculation
November Challenge 2016
Count Permutations, Chef and squares, Task for Alexey
March Cook-Off 2016
Alternating subarray prefix
February Challenge 2017
Chef and His Apartment Dues
March Challenge 2017
Cooking Schedule, Xenny and Alternating Tasks, Bear and Extra Number, Bandwidth of a matrix
April Challenge 2017
Stable market, Dish Of Life, Bear and Row 01, Bear and Clique Distances, Similar Dishes
September Challenge 2018 Division 1
Magician versus Chef, War of XORs, Chef and Adventures
November Challenge 2018 Division 2
Chef and Ridges, Chef and Difficult Contests, Chef and Happiness
October Challenge 2018 Division 2
Minimize Digitsum, Chef and Serves, Byte to Bit
RECode 12.0 (Rated for all)
Chef and String, Chef and Numbers
India