A user on this platform @xnor is harassing me. Who should I report him to? He is closing all of my posts every time and getting his friends to downvote my posts and trash talk me every time I post. Where do I report his harassment to?

Challenge: I want to know about the real roots of polynomials. As a pure mathematician, I care about the existence of such roots, rather than their numeric values. The challenge is to write the shortest program that takes a polynomial, of degree at most 4, and simply returns how many distinct re...

All roads lead to Rome code-challenge graph-theory internet search "All roads lead to Rome" is a saying that essentially means there are plenty of different ways of achieving an objective. Task Your task is to take a string identifying a Wikipedia page, and find the shortest path to the Wikipe...

Help me write Portuguese code-golf string Context (Feel free to skip, doesn't really matter for the algorithmic explanation of the task) Portuguese is a fairly complicated language to learn, mostly because of its grammar. One particular annoying thing is conjugating the verbs correctly. Portu...

Description of the problem Imagine a quarter of an infinite chessboard, as in a square grid, extending up and right, so that you can see the lower left corner. Place a 0 in there. Now for every other cell in position (x,y), you place the smallest non-negative integer that hasn't showed up in the...

Simple challenge: The code must be both valid Lisp and valid Fortran, and must print out "hello world" in both. Note: I've sunk about 5 hours into this at this point, I'm not even sure it's possible at this point... Details: Must be in a single source file. Any version of Fortran and any Lisp...