#P3776. lake counting

lake counting

Description

由于近期的降雨,雨水汇集在农民约翰的田地不同的地方。我们用一个NxM(1<=N<=100;1<=M<=100)网格图表示。每个网格中有水('W') 或是旱地('.')。一个网格与其周围的八个网格相连,而一组相连的网格视为一个水坑。约翰想弄清楚他的田地已经形成了多少水坑。给出约翰田地的示意图,确定当中有多少水坑。


Input Format

* Line 1: Two space-separated integers: N and M

 

  1行:两个空格隔开的整数:N M

 

* Lines 2..N+1: M characters per line representing one row of Farmer John's field. Each character is either 'W' or '.'. The characters do not have spaces between them.

 

  2行到第N+1行:每行M个字符,每个字符是'W''.',它们表示网格图中的一排。字符之间没有空格。

Output Format

* Line 1: The number of ponds in Farmer John's field.

 

  一行:水坑的数量

10 12
W........WW.
.WWW.....WWW
....WW...WW.
.........WW.
.........W..
..W......W..
.W.W.....WW.
W.W.W.....W.
.W.W......W.
..W.......W.
3