May Cook-Off 2014
Divide the Cake, Ups and Downs
October Cook-Off 2014
The Army, Walk on the Axis
June Challenge 2014
Chef and Subarray, Guessing Game
July Challenge 2014
Reach The Point, Count Substrings, Chef and Frogs, Garden Game, Chef and Rectangle Genome
August Challenge 2014
The Leaking Robot, Chef and Gift
October Challenge 2014
Magical Girl and Colored Liquid Potions, DevuLand, Dinosaurs and Laddus, Chef and Square, Chef and Painting, Chef and Ground, Remy paints the fence
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, Chef and A Large Permutation, Chef and Stones, Sereja and Votes, One Dimensional Kingdoms, Gcd Queries
January Cook-Off 2015
Suraj goes shopping, Tojo hates probabilities
January Lunchtime 2015
Piece of cake, Just multiply
February Challenge 2015
Let us play with rank list, Chef and Equality, Chef and Strings, Chef and Strange Formula, Time to Study Graphs with Chef, Chef and Chain, Chef and Complex String Coverage
July Challenge 2015
Bread, MasterChef, Na2a and lucky stone, Chef and Cube
October Challenge 2015
Count Subarrays, Rupsa and Equilateral Triangle, Cyclic shifts in permutation, Spheres, Who dares to be a millionaire, Time measure
August Cook-Off 2015
Chef and the XORed Number , Chef and the Wildcard Matching
United States