May Challenge 2017
Median of adjacent maximum numbers
June Challenge 2017
A Good Set, Chef and the Feast, Xenny and Coin Rankings, Triplets
July Challenge 2017
Chef and Sign Sequences, Whats in the Name
July Cook-Off 2017
Chang and Bitwise OR, Chang and the Perfect Function
April Lunchtime 2018 Division 2
Two vs Ten, The hardest gcd problem
April Challenge 2018 Division 2
Weight of Numbers, Count Good Prefixes, Average of Pairs, Workers
December Challenge 2018 Division 2
Chef and An Ideal Problem, Chef and Interactive XOR, Chef and Interactive Contests, Max and Electrical Panel, Chef and Meatballs
November Challenge 2018 Division 2
Chef and Ridges, Appy Loves One, Chef, Primes and Trees (Challenge), Chef and Difficult Contests, Chef and Happiness
February Challenge 2019 Division 2
Chef and Secret Ingredients, Deputy Chef, Appy and Contest, Chef and Magical Jars
November Lunchtime 2019 Division 2
Planting Trees, Pizza or Broccoli , Compress the List
February Challenge 2020 Division 2
The Theatre Problem, School of Geometry, Hard Cash
India