June Challenge 2015
Chef and Memory Limit, Chef and His Friend, Chef and Polygons
July Challenge 2015
Bread, MasterChef, Na2a and lucky stone, Chef and Cube
August Challenge 2015
Way Out, Gravity Guy, Cooking Machine, Aditi and Magic Trick
September Challenge 2015
Chain of Doughnuts, Count Steps in Matrix, Bank robbery, Lighthouses, Cracking the Code
December Challenge 2015
Chef and Filters, Oracle Devu and Longest Common Subsequence, Chef and the stones, Plane Division
August Cook-Off 2015
Chef and the XORed Number , Chef and the Wildcard Matching
July Lunchtime 2015
Greedy puppy, Puppy and game
June Challenge 2016
Chef and Array and K, Devu and an Array, Chef and Coins Game, Chef And Binary Operation, Chef And The Hiring Event
November Challenge 2016
Count Permutations, Friends Meeting, Urban Development, Gift and Chef, Chef and squares, Task for Alexey
India