I often see questions like this: co.combinatorics - Given index $i$, what element is at position $i$ in sorted subsets that are obviously better suited for the Math.SE site.
This particular question was deleted, while others are closed. And that is what should have happened.
But no comment or anything else in the item indicates that the OP was informed why it was unsuitable or that Math.SE was suggested. At best I suspect an ambiguous "off-topic" message was sent.
Are the OPs in fact given useful information, are they dismissed as rudely as it appears?