September Challenge 2017
Minimum Good Permutation, Chef and Pick Digit, Little Chef and Sums
October Challenge 2017
Chef and a great voluntary Program, Max Mex, Counter Test For CHEFSUM, A Balanced Contest
October Cook-Off 2017
Chef and Counting Test, Chef and Employment Test, Chef and Weird Queries
January Challenge 2018
Partition the numbers, String Merging, Rectangle, Maximum Score, K-Concatenation
January Cook-Off 2018
Multiple of 3, Survive in ChocoLand
February Challenge 2018
Chef And His Characters, Chef And The Patents
September Challenge 2018 Division 2
Magician versus Chef, War of XORs, Chef and Adventures
October Challenge 2018 Division 2
Chef and Serves, Byte to Bit
June Lunchtime 2018 Division 2
Counting Pretty Numbers, Summary Power
January Challenge 2019 Division 2
Lucky Number Game, Distinct Pairs, Chef and Modulo Game, Fancy Quotes
February Challenge 2019 Division 2
Manhattan Rectangle, Chef and Magical Jars, Chef and Secret Ingredients, Appy and Contest, Art of Balance, Deputy Chef
February Cook-Off 2019 Division 2
Buying New Tablet, Chef and Party
July Challenge 2019 Division 2
Minimum and Maximum, Chef and Mean
April Challenge 2020 Division 2
Strange Number, Squared Subsequences, Unit GCD, Sell All the Cars, COVID Pandemic and Long Queue
July Cook-Off 2020 Division 2
Even-tual Reduction, OR-thodox Distinction
India