http://poj.org/problem?id=3051 //* @author: 82638882@163.com import java.io.*; public class Main { static int[][] p; static int a,b,max=0,cnt; public static void main(String[] args) throws IOException { InputStreamReader is=new InputStreamReader(System.in); BufferedReader in=new BufferedReader(is); String[] ss=in.readLine().split(" "); a=Integer.parseInt(ss[0]); b=Integer.parseInt(ss[1]); p=new int[b+2][a+2]; for(int i=1;i<=b;i++) { for(int j=1;j<=a;j++) p[i][j]=in.read(); in.readLine(); } for(int i=1;i<=b;i++) { for(int j=1;j<=a;j++) { cnt=0; f(i,j); if(cnt>max) max=cnt; } } System.out.println(max); } static void f(int x,int y) { if(p[x][y]!='*')return; p[x][y]=0; cnt++; f(x,y+1); f(x,y-1); f(x+1,y); f(x-1,y); } }
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