June Challenge 2014
Chef and Subarray, Guessing Game
July Challenge 2014
Chef and Frogs, Count Substrings, Reach The Point
November Challenge 2014
Chef and Segment Game, Distinct Characters Subsequence, Chef and Red Black Tree, Let us construct palindrome
January Challenge 2015
Sereja and Number Division 2, Gcd Queries, One Dimensional Kingdoms, Sereja and Votes, Chef and Stones, Chef and A Large Permutation
May Challenge 2015
Devu and binary String, Chef and new recipe, Set Difference , Chef and Prime Divisors
August Challenge 2015
Way Out, Gravity Guy, Cooking Machine, Aditi and Magic Trick
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
July Lunchtime 2015
Greedy puppy, Puppy and game
India