TargetGrid

Class name: TargetGrid
Method name: minShots
Arguments: String[]
Returns: int

In this video game, a set of targets pop up on a grid.  You have arms that move
along two sides of the grid.  One shoots horizontally, taking out all targets
in a row.  The other shoots vertically, hitting all targets in a column.
However, ammunition is limited, so it is necessary to eliminate all targets in
as efficient a manner as possible.

Write a class TargetGrid containing a class minShots.  minShots returns the
minimum number of shots needed to take out all targets on a grid of size up to
25x25.

The method signature is:     
public int minShots(String[] targets) (be sure you declare the method public)

targets will contain a set of 1-25 Strings; these Strings will all be the same
length (1-25).  The Strings will consist solely of the characters 'N' (no
target) and 'T' (target).  (These conditions will be checked by TopCoder.)

The method should return an int that is the smallest number of rows and columns
combined that can be selected which will encompass all targets.

EXAMPLES:

NTNTNTT
TNNNNNN
TTNTTNT
TNNTNNT
NTNTNTN
NTNTNTT
NNNTTTT
This returns 6 - one shot for each column other than the third.

NNTNNNTN
NTTTNTNT
NNTNNNNN
NNNNNNTN
TNTNTTTT 
NNNNNNTN
NNTNNNTN
NNNNNNNN
This returns 4 - 2nd row, 5th row, 3rd column, 7th column.