June Challenge 2015
Chef and Memory Limit, Chef and Polygons
July Challenge 2015
Bread, Na2a and lucky stone, Chef and Cube
August Challenge 2015
Gravity Guy, Cooking Machine, Aditi and Magic Trick
September Challenge 2015
Lighthouses, Cracking the Code, Bank robbery, Count Steps in Matrix, Chain of Doughnuts
May Cook-Off 2015
Devu and friendship testing
July Cook-Off 2015
Cops and the Thief Devu, Maximize Disjoint Pair Sum
August Cook-Off 2015
Chef and the XORed Number , Chef and the Wildcard Matching
September Mega Cook-Off 2015
Forgotten Language, Stacks
July Lunchtime 2015
Greedy puppy, Puppy and game
India