Got most reputation for adding a three state finite automaton.
27 Algorithms computing if a number is a multiple of 3 Jan 11 '13
13 Can a tree be traversed without recursion, stack, or queue, and just a handful of pointers? Nov 8 '13
12 Minimum spanning tree vs Shortest path Dec 10 '13
10 Why is not known whether integer factorization can be done in polynomial time knowing how to do primality tests efficiently? Dec 15 '15