March 2012 Challenge
Free Shuttle Service, Home Delivery, Spoon in Matrix, Longest Weird Subsequence
April Challenge 2012
Stacking Pancakes, Greatest Dumpling Fight
May Challenge 2012
Jewels and Stones, A Home for Chef, Remember the recipe, Divisible Pairs, Lucky lucky number, Little Elephant and Median, Killing Gs, Digits Forest
December Challenge 2013
Rectangular Queries, Query on a tree VI, Reign, Magic Pairs, Funny Marbles, Chef and Codes, Cube Cakes, Art in Digital Age, Lucy and the Flowers, Petya and Sequence
January Challenge 2014
Bon Appetit, Chef and Feedback, Please like me, Byteland Tours, Meteor, ForbiddenSum, Counting D-sets, Sereja and Graph, Counting The Important Pairs, Magic Trick
June Challenge 2014
Little Elephant and Blocks, Maxim and Progressions, Chef and Functions, Chef and Digit Jumps, DARTS501, Chef and Subarray, Sereja and Arcs, Two Companies, Guessing Game, Forgot Password
