June Challenge 2017
A Good Set, Chef and the Feast, Xenny and Coin Rankings, Triplets, Pairwise union of sets, Chef and Prime Queries
August Long Challenge 2017
Chef and Rainbow Array, Chef And Fibonacci Array, Chef and Mover, Palindromic Game, Greedy Candidates, Strings and Graphs
January Challenge 2018
Partition the numbers, String Merging, Maximum Score, K-Concatenation, Rectangle
February Challenge 2018
Chef And His Characters, Chef And The Patents, Points Inside A Polygon, Car-pal Tunnel, Permutation and Palindrome
June Cook-Off 2018 Division 1
Good Permutations, Sonya and Segments
April Challenge 2018 Division 1
Cutting Plants, Highway Crossing, Count Good Prefixes
July Challenge 2018 Division 1
Reach Equilibrium, No Minimum No Maximum, Gears, Strike or Spare
Bangladesh