February 2012 Challenge
Lucky Long, Lucky Count, Count of Maximum, Word Couting, Smart Chef vs Evil Chef
March 2012 Challenge
Tom And Jerry, Free Shuttle Service, Home Delivery, Spoon in Matrix
April Challenge 2012
Double Strings, Greatest Dumpling Fight, Similar Graphs
May Challenge 2012
Killing Gs, Jewels and Stones, Lucky lucky number, Remember the recipe
May Cook-Off 2012
Little Elephant and Strings
August Challenge 2013
Little Elephant and Lemonade, Hello Hello, Splitting Candies
November Challenge 2018 Division 2
Chef and Difficult Contests
October Challenge 2018 Division 2
Chef and Serves, Byte to Bit, Minimize Digitsum
November Challenge 2021 Division 3 (Rated)
Weird Palindrome Making, Hill Sequence, Equal Coins, Which Fuel is Cheaper
December Challenge 2021 Division 3 (Rated)
Valleys and Hills, List of Lists, Utkarsh and Placement tests
United States