i rewrote the description a bit, hopefully it makes more sense

How is 200 an unusual denomination?

Okay, now I see it explicitly mentions 200 dollar bills. Sorry for the noise.

The following isn't true

and assuming the ATM always has enough money to satisfy a withdrawal on any amount

Because you forgot this part:

or output -1 if it is impossible.

About your last two points:

I saw a comment where there are test cases greather than 1500, so correct either the test cases or the problem statement

Removed some sample tests in a couple languages where n was 5000, the final tests seemed ok.

Consider removing 200 from the denominations, as there is no such thing as a $200 bill; or make it in a fictional currency instead of dollars.

You could use Argentine Peso, we have all those notes/bills, including the 200 one.

The kata's author seems active, so I'll let him handle the description changes.