January Challenge 2015
Chef and A Large Permutation, Chef and Stones, Sereja and Votes, One Dimensional Kingdoms, Gcd Queries, Queries on the String
April Challenge 2015
Count Sequences, Chef and Interview, Broken Telephone, Inversion sorting, Chef and Piano Scales
May Challenge 2015
Set Difference , Chef and new recipe
July Challenge 2015
Addition and Multiplication, Na2a and lucky stone
August Challenge 2015
Way Out, Gravity Guy, Devu And Churu , Cooking Machine, Aditi and Magic Trick, Chef and insomnia, Chef and Path
February Challenge 2016
Devu and a light discussion
March Challenge 2016
Palindromic substrings, maximize the sum, Parity tree
Vietnam