December Challenge 2017
Chef and Universe, Total Diamonds, Chef And his Cake, Chef, Leonardo And Queries, Chef And Easy Xor Queries, Penalty Shoot-out, Red and blue points, Chef and Hamming Distance of arrays, Chef and Direction
December Cook-Off 2017
Minimum SubArray, Rotate Point, Beautiful Array, Football Match
December Lunchtime 2017
Strange Function, Four Friends, Too Much Sweetness, Days in Month
January Challenge 2018
(Challenge) Chef and Palindromes, Killing Monsters, A humongous Query, Simplify the Square Root, Killjee and k-th letter , K-Concatenation, Maximum Score, Rectangle, String Merging, Partition the numbers
April Cook-off 2018 Division 1
Run Direction, Chef Goro, Binary Nim
September Mega Cook-Off 2018 Division 1
OneTwo, Make a Permutation
March Lunchtime 2018 Division 1 (Unrated)
Queries with GCD, Partitions, Three Integers, Magic Elements
April Challenge 2018 Division 1
Chef and Same Old Recurrence, Chef and Same Old Recurrence 2, Count Good Prefixes, Highway Crossing, S Semi-palindromic, Cutting Plants, Chef at the Food Fair, Vaibhav and Ministers, Chef and Array (Challenge)
August Lunchtime 2018 Division 1
Chef and Eid, Mix Mix Game, GukiZ Has More Candies
September Challenge 2019 Division 1
Biladerim Icin, Fuzzy Linear Combinations, Expected GCD, Doofish Set, Dodgers, Power Sum, Chef Designed a Network
China