April Challenge 2016
Chef and Ballons, Chef And Coloring
November Challenge 2016
Count Permutations, Task for Alexey
March Cook-Off 2016
Alternating subarray prefix, Digital clock
October Cook-Off 2016
Watson asks Does Permutation Exist, ChefWatson uses Social Network
May Challenge 2017
Chef and his daily routine, Chef and Subsequences, Median of adjacent maximum numbers, Blocked websites, Courses in an university, Chef and Sub Array
June Challenge 2017
A Good Set, Chef and the Feast, Xenny and Coin Rankings, Triplets, Pairwise union of sets
May Challenge 2018 Division 2
Mighty Friend, Minimum Deletions, Xor Again, Dibs on Fibs
Bangladesh