August Challenge 2014
Chef and Gift, The Leaking Robot
January Challenge 2015
Chef and Stones, Sereja and Votes, Gcd Queries
February Challenge 2015
Chef and Chain, Chef and Strings, Let us play with rank list, Chef and Equality
May Challenge 2015
Chef and Cake, Chef and new recipe, Chef and Prime Divisors, Devu and binary String, Set Difference
June Challenge 2015
Chef and Memory Limit, Chef and Polygons
August Challenge 2015
Aditi and Magic Trick, Cooking Machine, Gravity Guy, Way Out
May Cook-Off 2015
Devu and friendship testing
July Cook-Off 2015
Cops and the Thief Devu, Maximize Disjoint Pair Sum
February Challenge 2016
Chef and Strange Operations, Chef-Detective
August Long Challenge 2017
Chef and Rainbow Array, Chef and Mover, Greedy Candidates
India