March Challenge 2018 DIV 2
A Big Sale, Mix the Colors, Chef and Glove, Minion Chef and Bananas, Chef and Easy Problem
December Challenge 2018 Division 2
Chef and Interactive Contests, Chef and An Ideal Problem
November Challenge 2018 Division 2
Chef and Ridges, Appy Loves One, Good Median, Chef and Difficult Contests, Chef and Happiness
April Challenge 2019 Division 2
Fencing, Subtree Removal, Maximum Remaining, Playing with Numbers, Mininum XOR over Tree, Friend or Girlfriend
May Challenge 2019 Division 2
Matches, Trees and Degrees, Reduce to One, Where to Build the Roads
June Challenge 2019 Division 2
Guddu on a Date, (Challenge) SnackDown 99, Sum and GCD, Intersecting Paths, Chef and Ingredients, Lent Money, Chef and Proxy, Road Signs
July Challenge 2019 Division 1
Hit the Coconuts, Snake and Apple Tree, Guess the Prime!, Maximum and Minimum, Circular Merging
China