Trick
Detect Hollow Arrays:
An array is considered hollow when it contains n zeros in the middle
that are both preceded and followed by n non-zero numbers; n must be
greater than or equal to 3.
Implement the isHollow function so that it returns true for arrays that
are hollow, otherwise return false.
Hollow:
1,1,1,0,0,0,1,1,1
1,1,1,1,0,0,0,0,1,1,1,1
-55,28,53,24,0,0,0,0,47,-85,46,79
Not Hollow:
1,1,0,0,1,1
1,0,1,0,0,0,1,1,1
1,1,1,0,0,0,1,1,0
1,1,0,0,0,1,1
0,0,0,1,1,1,1,1,1