February 2012 Challenge
Lucky Long, Lucky Count, Count of Maximum, Word Couting
March 2012 Challenge
Free Shuttle Service, Home Delivery, Spoon in Matrix
April Challenge 2012
Parallel Computing, Fit to Play, Double Strings, Stacking Pancakes, Greatest Dumpling Fight, Similar Graphs
May Challenge 2012
A Home for Chef, Lucky lucky number, Remember the recipe, Jewels and Stones
June Challenge 2012
Little Elephant and Candies, Arranging Cup-cakes
February 2013 Challenge
Little Elephant and Cards, Buy1-Get1, Climbing Stairs, Efficient Painting
March Challenge 2013
Random decreasing function, Tourist Translations, Approximately, Fire Escape Routes, Minesweeper
April Challenge 2013
Kingdom Unity, Maximum Weight Difference
India