April Challenge 2015
Chef and Interview, Count Sequences, Chef and Piano Scales, Broken Telephone
May Challenge 2015
Devu and binary String, Chef and Prime Divisors, Set Difference , Chef and new recipe
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
August Challenge 2015
Gravity Guy, Cooking Machine, Aditi and Magic Trick
September Challenge 2015
Lighthouses, Chain of Doughnuts, Count Steps in Matrix
October Challenge 2015
Time measure, Count Subarrays, Who dares to be a millionaire
April Cook-Off 2015
Equality, Version Control System
May Cook-Off 2015
Devu and friendship testing
July Cook-Off 2015
Maximize Disjoint Pair Sum, Cops and the Thief Devu
July Lunchtime 2015
Greedy puppy, Puppy and game
August Lunchtime 2015
Churu and lost string, Minimum Maximum
India