Poll #1, Stairs Problem

Encountered this question when I was climbing the stairs one day. Even though I'm quite proficient in maths, this question still got me thinking. The answer is 26, hey, looks like no one got it correct (the 1 vote on 26 was mine). Let me analyse the question for you guys.

The number of storeys of stairs climbed is governed by a simple formula, namely number of storeys= final storey- initial storey.
For example, if you climbed from the second to the twelfth storey, you would have climbed 10 storeys (12-2=10).
Do take note that the ground floor is the 1st storey. And so the correct answer is 26 [(17-1)+(14-4)=26].