May Challenge 2015
Devu and binary String, Chef and new recipe, Chef and Prime Divisors, Set Difference
June Challenge 2015
Chef and His Friend, Chef and Memory Limit
August Challenge 2015
Gravity Guy, Cooking Machine
September Challenge 2015
Chain of Doughnuts, Count Steps in Matrix
October Challenge 2015
Who dares to be a millionaire
November Challenge 2015
Eugene and function, Chef and cakes
May Cook-Off 2015
Devu and friendship testing
July Cook-Off 2015
Cops and the Thief Devu, Maximize Disjoint Pair Sum
November Cook-Off 2015
Sereja and Array and Subtracting
April Challenge 2016
Chef And Coloring, Chef And Magical Path
March Challenge 2017
Xenny and Alternating Tasks, Bear and Extra Number, (CH) Bear and Sorted Rows, Bandwidth of a matrix
April Challenge 2017
Dish Of Life, Bear and Row 01, Similar Dishes
May Challenge 2017
Courses in an university, Median of adjacent maximum numbers, Blocked websites, Chef and his daily routine, Chef and Sub Array
June Challenge 2017
A Good Set, Chef and the Feast, Xenny and Coin Rankings, Triplets
September Challenge 2017
Chef and Pick Digit, Minimum Good Permutation, Little Chef and Sums
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