June Challenge 2015
Chef and Polygons, Chef and Memory Limit
July Challenge 2015
Na2a and lucky stone, Chef and Cube, Bread
August Challenge 2015
Way Out, Gravity Guy, Devu And Churu , Cooking Machine, Aditi and Magic Trick, Chef and insomnia
September Challenge 2015
Count Steps in Matrix, Cracking the Code, Lighthouses, Bank robbery, Nikitosh and xor, Chain of Doughnuts
November Challenge 2015
Eugene and function, Chef and cakes
December Challenge 2015
Chef and the stones, Plane Division, Oracle Devu and Longest Common Subsequence, Chef and Filters
August Cook-Off 2015
Chef and the XORed Number , Chef and the Wildcard Matching
September Mega Cook-Off 2015
Forgotten Language, Stacks
August Challenge 2016
Chef and His Garden, Fighting Ebola, Chef and Round Run
September Challenge 2016
Chef and digits of a number, Chef and calculation, JosephLand, Faded Palindromes, Chef and Matrix Division, Dividing Machine, Chef and Friends
October Challenge 2016
Sereja and Progressions, Chef and Keyboard, Fenwick Iterations, Chef and Three Dogs, Chef and Two String
November Challenge 2016
Count Permutations, Chef and squares, Task for Alexey
India