OP solved it, closing

.

00800 is a palindrome in 500800

030 is a palindrome in 694030

It said that the numbers contained in the map means the height of the place, and I drew a map to let you understand the map's look.

No, it popped up because C got approved - you were first.

On the other hand, maybe I was too quick to dismiss. I didn't want a merge conflict on my translation; eight years on a sweet and short description and the minute I make a translation somebody wants to change it ..

( I like short descriptions. )

Unless it's explicitly specified, I would expect numbers to be in normal integer range ( not arbitrary precision integer range. call it 32-bit ints. ). And up to, oh, about 100 or so. That is what I would expect.

And that should not be a problem for reasonably efficient code. So unless you're being extraordinarily inefficient ( which would be unexpected, given that the algorithms are fairly well known and, if you don't know them, one or two clicks away ), or certain translations have much more intensive testing than I have seen actually happening in the languages I've seen, you will never run into trouble. Despite this being a 5. ( It's an old kata. )

Unless testing parameters are outside reasonable, to-be-expected ranges, I see no reason to show us the limits of testing. Because you will not run into them.

Mollycoddling solvers is overrated.

From any index=n, you can go at the next pyramid level only to: n or n+1. 2 can go to 8 or 5, 4 can go to 5 or 9 and so on.

Yes.

They don't change.

I guess you're not yet going to be a manager today. :P

Did you remove the python translation? I can not see it anymore.

Eheh ^^

Yep, looks like the correct version. :]