September Challenge 2016
Chef and Friends, Chef and digits of a number, Faded Palindromes, Chef and calculation
October Challenge 2016
Chef and Keyboard, Fenwick Iterations, Chef and Three Dogs, Chef and Two String
November Challenge 2016
Count Permutations, Chef and squares, Task for Alexey
January Challenge 2017
Capital Movement, Cats and Dogs, Reservior
February Challenge 2017
Chef and Yoda, Chef and Triangles, Chef and His Apartment Dues, Most Frequent Element, Gerrymander
March Challenge 2017
Bandwidth of a matrix, (CH) Bear and Sorted Rows, Bear and Extra Number, Xenny and Alternating Tasks, Cooking Schedule, Pishty and birthday
January Cook-Off 2017
Digit Longest Increasing Subsequences 2
June Challenge 2017
Chef and Prime Queries, Saboteur (Challenge), Euler Sum, A Good Set, Chef and the Feast, Xenny and Coin Rankings, Triplets, Pairwise union of sets
August Long Challenge 2017
Palindromic Game, Strings and Graphs, Greedy Candidates, Chef and Mover, Chef And Fibonacci Array, Chef and Rainbow Array
August Cook-Off 2017
Matrix and Chef, Real obtuse, From heaven to earth
February Challenge 2018
Broken Clock, Lucas Theorem, Chef And His Characters, Chef And The Patents, Chef and odd queries, Points Inside A Polygon, Car-pal Tunnel, (Challenge) Biased Committee, Permutation and Palindrome
India