Interesting but not understandable.

good!

Doesn't this take O(n^2) time though?

Merged recently on C standard

Damn. So fucking clever

For someone like me teetering the edge of beginner, could you point to a good starting resource for what is being discussed here? Bitwise operators are way above me

Thanks for the link, @hobovsky!

I'll give it a read :)

Except this is UB: https://stackoverflow.com/a/28783339/1756361

This is the approach I took too, except I moved mine into a macro to keep it a little more readable and re-usable:

#define SWAP(x, y) (x ^= y ^= x ^= y)

I had to work this out in a Base Mode calculator to figure it out. Placeholders be damned; this is how I'm swapping values for now on