February Challenge 2015
Let us play with rank list, Chef and Equality, Chef and Chain
March Challenge 2015
Chef and Notebooks, Devu and his Class
April Challenge 2015
Chef and Interview, Broken Telephone, Division of Lands, Chef and Piano Scales
May Challenge 2015
Chef and Prime Divisors, Chef and new recipe, Set Difference , Devu and binary String
June Challenge 2015
Chef and Memory Limit, Chef and Polygons
July Challenge 2015
Bread, Na2a and lucky stone, Chef and Cube
August Challenge 2015
Way Out, Aditi and Magic Trick, Gravity Guy, Cooking Machine
October Challenge 2015
Time measure, Count Subarrays, Who dares to be a millionaire, Spheres
May Cook-Off 2015
Devu and friendship testing
August Cook-Off 2015
Chef and the Wildcard Matching
October Cook-Off 2015
Almost Sorted Permutation
September Lunchtime 2015
Sum of palindromic numbers
March Challenge 2016
Palindromic substrings, maximize the sum, Chef And Special Dishes
India