October Challenge 2014
Chef and Ground, Magical Girl and Colored Liquid Potions
November Challenge 2014
Distinct Characters Subsequence
January Challenge 2015
Sereja and Votes, Gcd Queries
February Challenge 2015
Chef and Chain, Chef and Equality
June Challenge 2015
Chef and His Friend, Chef and Memory Limit, Chef and Polygons
July Challenge 2015
Bread, Na2a and lucky stone, Chef and Cube
October Challenge 2015
Count Subarrays, Who dares to be a millionaire, Spheres
January Long Challenge 2016
Rupsa and the Game, Devu and Perfume, Churu and Balls, Chef and Time Machine
March Challenge 2016
Palindromic substrings, maximize the sum
June Challenge 2016
Chef And The Hiring Event, Chef and Rectangle Array, Chef And Binary Operation, Chef and Coins Game, Devu and an Array
July Challenge 2016
Chef and Robots Competition, Chef and Tetris, Andrash and Stipendium
August Challenge 2016
Chef and Chocolate, Chef and Round Run
September Challenge 2016
Chef and Friends, Chef and digits of a number, Faded Palindromes, JosephLand, Chef and calculation
March Cook-Off 2016
Alternating subarray prefix
India