I was asked to figure out the maximum number of trials I would need to open up a safe without knowing the combination.

The dial set starts with 0 and one would first turn clockwise to the first combination number and then counterclockwise to the second combination number and then finally clockwise to the last combination number, at which point the safe door will pop open immediately. There are 50 numbers on dial (I was told 0 will not be one of the combination numbers).

I answered 50^3 but was told that was not the answer.