December Challenge 2015
Plane Division, Chef and the stones, Oracle Devu and Longest Common Subsequence
September Lunchtime 2015
Sum of palindromic numbers
April Challenge 2016
Chef and Ballons, Chef And Magical Path, Chef And Coloring
June Challenge 2016
Chef And The Hiring Event, Chef And Binary Operation, Chef and Coins Game, Devu and an Array
August Challenge 2016
Chef and Chocolate, Chef and Round Run
September Challenge 2016
Chef and calculation, Faded Palindromes, Chef and Friends, Chef and digits of a number
October Challenge 2016
Sereja and Progressions, Chef and Keyboard, Fenwick Iterations, Chef and Three Dogs
November Challenge 2016
Count Permutations, Chef and squares, Task for Alexey
February Challenge 2017
Chef and Triangles, Chef and His Apartment Dues, Most Frequent Element, Gerrymander
January Cook-Off 2017
Digit Longest Increasing Subsequences 2
India