September Challenge 2017
Minimum Good Permutation, Little Chef and Sums, Chef and Pick Digit
September Challenge 2018 Division 2
Magician versus Chef, War of XORs, Chef and Adventures
October Challenge 2018 Division 2
Appy and Balloons , Chef and Circles, Byte to Bit, Chef and Serves, Chef and Surprise Chessboard, Minimize Digitsum
April Challenge 2019 Division 2
Playing with Numbers, Fencing, Subtree Removal, Maximum Remaining, Friend or Girlfriend
April Lunchtime 2019 Division 2
Attendance, Fast Food, Minimum Sum
October Challenge 2019 Division 1
Even Edges, Bacterial Reproduction, Chef and Maximum Star Value, Array Modification, (Challenge) Maximizing LIS
Bangladesh