October Challenge 2015
Who dares to be a millionaire, Count Subarrays, Rupsa and Equilateral Triangle
December Challenge 2015
Chef and the stones, Oracle Devu and Longest Common Subsequence
August Cook-Off 2015
Chef and the Wildcard Matching
January Long Challenge 2016
Churu and Balls, Chef and Time Machine
March Challenge 2016
Palindromic substrings, maximize the sum
April Challenge 2016
Chef and Ballons, Chef And Coloring, Chef And Magical Path, Help Watson Escape
May Challenge 2016
Chef and Balls, Chef and Big Soccer, Laddu
June Challenge 2016
Chef and Coins Game, Devu and an Array
August Challenge 2016
Chef and Round Run, Chef and Chocolate
September Challenge 2016
Chef and digits of a number, Faded Palindromes, Chef and calculation
October Challenge 2016
Sereja and Progressions, Chef and Keyboard, Fenwick Iterations, Chef and Three Dogs
November Challenge 2016
Chef and squares, Task for Alexey
April Challenge 2020 Division 2
Strange Number, Squared Subsequences, Sell All the Cars, COVID Pandemic and Long Queue
May Challenge 2020 Division 2
Coronavirus Spread, Isolation Centers
March Cook-Off 2020 Division 2
Find Your Gift, Box of Chocolates
India