January Challenge 2015
Sereja and Votes, Gcd Queries, Chef and Stones
February Challenge 2015
Chef and Chain, Chef and Equality
July Challenge 2015
Na2a and lucky stone, Chef and Cube, Bread
August Challenge 2015
Cooking Machine, Aditi and Magic Trick
October Challenge 2015
Count Subarrays, Who dares to be a millionaire
May Cook-Off 2015
Devu and friendship testing
August Cook-Off 2015
Chef and the Wildcard Matching
July Lunchtime 2015
Greedy puppy, Puppy and game
June Challenge 2016
Chef And The Hiring Event, Chef and Coins Game, Devu and an Array
September Challenge 2016
Faded Palindromes, Chef and calculation, Chef and digits of a number
March Challenge 2017
Xenny and Alternating Tasks, Bear and Extra Number, Bandwidth of a matrix
November Challenge 2017
Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes
United States