October Cook-Off 2015
Almost Sorted Permutation, Word Stem
November Cook-Off 2015
Sereja and Line, Sereja and Array and Subtracting
September Cook-Off 2016
Lazy Jem, The Lost Arithmetic Sequences
March Challenge 2017
Cooking Schedule, Xenny and Alternating Tasks, Pishty and birthday, Bear and Extra Number, (CH) Bear and Sorted Rows, Bandwidth of a matrix
April Challenge 2017
Stable market, Similar Dishes, Bear and Clique Distances, Bear and Row 01, Dish Of Life, Chef and Divisor Tree
May Challenge 2017
Chef and his daily routine, Courses in an university, Blocked websites, Median of adjacent maximum numbers, Chef and Subsequences
November Challenge 2018 Division 1
Appy Loves One, Good Median, Chef, Primes and Trees (Challenge), Magician versus Chef 2
Singapore