March Challenge 2017
Bear and Extra Number, Xenny and Alternating Tasks
August Long Challenge 2017
Chef and Rainbow Array, Chef and Mover, Palindromic Game
December Challenge 2017
Total Diamonds, Chef And his Cake, Penalty Shoot-out, Chef and Hamming Distance of arrays
August Cook-Off 2017
From heaven to earth, Real obtuse
December Cook-Off 2017
Beautiful Array, Football Match
June Lunchtime 2017
Maximum Unique Segment, Two Numbers
January Challenge 2018
K-Concatenation, Maximum Score, Rectangle
June Challenge 2018 Division 2
Sheokand and String, Naive Chef
Bangladesh