November Challenge 2016
Chef and squares, Task for Alexey, Count Permutations
February Challenge 2017
Chef and Triangles, Chef and His Apartment Dues
June Challenge 2017
Triplets, Xenny and Coin Rankings, A Good Set
October Challenge 2017
Chef and Magic Arrays, Chef and a great voluntary Program, Chef and Cycled Cycles, Max Mex, Counter Test For CHEFSUM, A Balanced Contest
October Cook-Off 2017
Chef and Counting Test, Chef and Weird Queries, Chef and Employment Test
May Challenge 2018 Division 1
Change the Signs, Fake Binary Search, Dibs on Fibs
December Challenge 2018 Division 2
Max and Electrical Panel, Chef and Interactive XOR, Chef and Meatballs, Chef and Interactive Contests, Chef and An Ideal Problem
Plinth-Enigma'19 LNMIIT Techfest - (Rated for all)
XOR! Wait for it, Return of the Gargoyle King, Summation over nCr
India