November Challenge 2015
Eugene and function, Chef and cakes, Chef and collection of stamps
January Long Challenge 2016
Churu and Balls, Cyclist Race, Chef and Time Machine, Devu and Perfume
March Challenge 2016
Palindromic substrings, maximize the sum, Chef And Special Dishes
April Challenge 2016
Chef and Ballons, Chef And Coloring, Fibonacci Queries, Help Watson Escape
May Challenge 2016
Chef and Balls, Forest Gathering, Chef and Big Soccer, Laddu
July Challenge 2016
Andrash and Stipendium, Chef and Tetris, Chefland and Electricity
August Challenge 2016
Chef and Circle Run, Funny gnomes, Chef and Chocolate, Chef and Round Run
September Challenge 2016
Chef and Friends, Dividing Machine, Chef and digits of a number, Faded Palindromes, JosephLand, Chef and calculation
October Challenge 2016
Chef and Keyboard, Chef and Three Dogs
November Challenge 2016
Count Permutations, Task for Alexey, Chef and squares, Gift and Chef, Friends Meeting
December Challenge 2016
Train Partner, Kth Max Subarray
October Challenge 2018 Division 2
Minimize Digitsum, Chef and Serves, Byte to Bit
Cyprus