### Problem Statement

You are given a String[] blocks representing the layout of a city. Each character of each element of blocks represents one city block. A 'B' character represents a bus stop, and a '-' represents all other spaces.

The fare for traveling on the bus is equal to the manhattan distance (difference in X-coordinates plus difference in Y-coordinates, see the first example for clarification) between the starting and ending bus stops. Return the largest possible fare for a trip from one bus stop to another.

### Definition

 Class: CityBuses Method: maximumFare Parameters: String[] Returns: int Method signature: int maximumFare(String[] blocks) (be sure your method is public)

### Constraints

-blocks will contain between 1 and 50 elements, inclusive.
-Each element of blocks will contain between 1 and 50 characters, inclusive.
-Each element of blocks will contain the same number of characters.
-Each character of each element of blocks will be 'B' or '-'.
-There will be at least two bus stops.

### Examples

0)

 ```{"B--", "B--", "--B"} ```
`Returns: 4`
 Starting from the top-left, the coordinates of the bus stops are (0,0), (1,0), and (2,2). The distance is the difference in X-coordinates plus the difference in y-coordinates. So, the distance between each pair of bus stops is as follows: ```(0,0) - (1,0) : 1 + 0 = 1 (1,0) - (2,2) : 1 + 2 = 3 (0,0) - (2,2) : 2 + 2 = 4 ``` The largest distance (thus the highest fare) is 4.
1)

 ```{"--B", "---", "-B-"}```
`Returns: 3`
 There's only one route we can take, and it has a distance of 3.
2)

 ```{"--B-", "B---", "-B-B", "B---"} ```
`Returns: 5`
 The largest distance here is from (0,2) to (3,0).
3)

 `{"BB"}`
`Returns: 1`
 A short, and unexciting bus ride.

#### Problem url:

http://www.topcoder.com/stat?c=problem_statement&pm=6388

#### Problem stats url:

http://www.topcoder.com/tc?module=ProblemDetail&rd=10063&pm=6388

timmac

#### Testers:

PabloGilberto , brett1479 , Olexiy , marian

#### Problem categories:

Brute Force, Simple Math, Simple Search, Iteration