September Challenge 2016
Chef and digits of a number
March Challenge 2017
Xenny and Alternating Tasks
September Challenge 2017
Chef and Pick Digit, Minimum Good Permutation, Little Chef and Sums
October Challenge 2019 Division 2
Phone Prices, Operations on a Matrix
April Challenge 2020 Division 2
Strange Number, Squared Subsequences, Unit GCD, Sell All the Cars, COVID Pandemic and Long Queue
March Cook-Off 2020 Division 2
Find Your Gift, Box of Chocolates
May Lunchtime 2020 Division 2
Weird Walk, Lost Weekends
June Challenge 2020 Division 2
Even Matrix, The Tom and Jerry Game!, Chef and Icecream, Chef and String, Chef and Price Control
India