gistfile1.cpp

#include<cstdio>
#include<iostream>

using namespace std;

void dfs(int, int);


int n, m;
char a[200][200];
int rain = 0;
int i, j, t, s;

int main(){
	scanf("%d", &n);
	scanf("%d", &m);
	
	for(i = 0; i <= n - 1; i++){
		for(j = 0; j <= m - 1; j++){
			scanf("%1c", &a[i][j]);
		}
	}
	
	for(i=0; i <= n - 1; i++){
		for(j = 0; j <= m - 1; j++){
			if(a[i][j] == 'W'){
				dfs(i, j);
				rain++;
			}
		}
	}
	
	/*for(i = 0; i <= n - 1; i++){
		for(j - 0; j <= m - 1; j++){
			if(a[i][j] == 'W') rain++;
		}
	}
	*/
	printf("%d", rain);
	
	return 0;
	
}
	
void dfs(int x, int y){
	for(t = -1; t <= 1 ; t++){
		for(s = -1; s <= 1; s++){
			/*if(s == 0 && t == 0){
				break;
			}else{*/
				int dx = x + t;
				int dy = y + s;
				
				if(0 <= dx && dx <= n - 1 && 0 <= dy && dy <= m - 1 && a[dx][dy] == 'W'){
					a[dx][dy] == '.';
					dfs(dx, dy);
				}
		//	}
		}
	}
}