October Challenge 2015
Who dares to be a millionaire, Count Subarrays
December Challenge 2015
Chef and the stones, Plane Division
December Challenge 2016
Train Partner, Kirito in labyrinth, Our Base is Under Attack
January Challenge 2017
Tourists in Mancunia, Cats and Dogs, Capital Movement
March Challenge 2017
Xenny and Alternating Tasks, Bear and Extra Number, Bandwidth of a matrix
August Long Challenge 2017
Chef and Rainbow Array, Chef And Fibonacci Array, Chef and Mover, Palindromic Game, Greedy Candidates
September Challenge 2017
Sereja and Commands, Little Chef and Sums, Fill The Matrix, Chef and Pick Digit, Minimum Good Permutation
January Challenge 2018
K-Concatenation, Maximum Score, Rectangle, String Merging
March Challenge 2018 DIV 1
Minions and Voting, Mix the Colors, Chef and Easy Problem, Pishty and Triangles
August Lunchtime 2018 Division 1
Chef and Eid, Mix Mix Game
April Cook-Off 2021 Division 1
Tree Distances, OR of ANDs, Valet Parking
Bangladesh