August Long Challenge 2017
Chef And Fibonacci Array, Chef and Mover, Palindromic Game, Mathison and the Data Warehouse (Challenge), Greedy Candidates, Strings and Graphs, Chef and Rainbow Array
September Challenge 2017
Chef and Pick Digit, Little Chef and Sums, Fill The Matrix, Weasel does Xor on Tree, Minimum Good Permutation, Sereja and Commands
November Challenge 2017
Periodic Palindrome Construction, Villages and Tribes, Lovers Gift, Chef goes Left Right Left, Chef Hates Palindromes, Product on the segment by modulo , Chef and Intersection Line, Chef and Subarray Queries
February Lunchtime 2018
Prefix borders, Game with numbers, Jumping in the hills
March Challenge 2018 DIV 1
Mix the Colors, Minion Chef and Bananas, Minions and Voting, Chef and Glove, A Big Sale, Chef and Gcd Queries, Chef and Easy Problem, Pishty and Triangles
September Challenge 2018 Division 1
Chef and Condition Zero (Challenge), Table Game, Bad Shuffle
January Cook-Off 2022 Division 1
Subsegment Divisibility , Merged LIS, Prime Graph, Erase All But One
