June Challenge 2015
Steady tables, Chef and His Friend, Chef and Memory Limit, Chef and Polygons, Sereja and Matrix Division
July Challenge 2015
Bread, MasterChef, Na2a and lucky stone, Chef and Cube, Rohith and Circles
August Challenge 2015
Devu And Churu , Chef and insomnia, Aditi and Magic Trick, Cooking Machine, Gravity Guy, Social Cluster, Way Out
September Challenge 2015
Filling the maze, Chain of Doughnuts, Nikitosh and xor, Count Steps in Matrix, Bank robbery, Lighthouses, Cracking the Code, Chef and Chetris
December Challenge 2015
Chef and Filters, Oracle Devu and Longest Common Subsequence, Chef and the stones, Plane Division
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, Super Numbers, Stacks
October Cook-Off 2015
Word Stem, Almost Sorted Permutation
January Long Challenge 2016
Rupsa and the Game, Devu and Perfume, Chef and Time Machine, Cyclist Race, Chef and Making Triples, Churu and Balls, Chef and Inflation, Sereja and Salesman
February Challenge 2016
Sereja and Two Lines, Chef and Strange Operations, Chef-Detective
March Challenge 2016
Palindromic substrings, maximize the sum
March Cook-Off 2016
Digital clock, Alternating subarray prefix
India