January Challenge 2015
Chef and Stones, Sereja and Votes, Chef and A Large Permutation
February Challenge 2015
Chef and Chain, Chef and Strange Formula, Let us play with rank list, Chef and Equality
March Challenge 2015
Chef and Notebooks, Sign Wave
April Challenge 2015
Count Sequences, Chef and Piano Scales, Broken Telephone, Chef and Interview
May Challenge 2015
Devu and binary String, Chef and Prime Divisors, Set Difference , Chef and new recipe
May Cook-Off 2015
Devu and friendship testing
November Challenge 2017
Chef and Subarray Queries, Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes
April Challenge 2018 Division 2
Workers, Average of Pairs, Count Good Prefixes, Weight of Numbers
May Challenge 2018 Division 2
Mighty Friend, Minimum Deletions, Xor Again
October Challenge 2018 Division 2
Appy and Balloons , Beautiful Bricks, Minimize Digitsum, Chef and Surprise Chessboard, Chef and Serves, Byte to Bit
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