Poj Solution 2250

http://poj.org/problem?id=2250

import java.io.BufferedInputStream;   
import java.util.Scanner;   
 
public class Main{   
  
    private static final int MAXLEN = 101;   
    private static int[][] c = new int[MAXLEN][MAXLEN];   
    private static int[][] b = new int[MAXLEN][MAXLEN];   
  
    public static void main(String[] args) {   
        Scanner scan = new Scanner(new BufferedInputStream(System.in)); 

  
        while (scan.hasNext()) {   
            String s1 = "", s2 = "";   
            while (scan.hasNext()) {   
                String s = scan.nextLine();   
                if (s.startsWith("#")) {   
                    break;   
                }   
                s.trim();   
                s1 = s1 + s + " ";   
            }   
            while (scan.hasNext()) {   
                String s = scan.nextLine();   
                if (s.startsWith("#")) {   
                    break;   
                }   
                s.trim();   
                s2 = s2 + s + " ";   
            }   
            String[] ss1 = s1.trim().split(" ");   
            String[] ss2 = s2.trim().split(" ");   
            lcsLength(ss1, ss2);   
            printLCS(ss1, ss1.length, ss2.length);   
        }   
    }   
  
    public static void lcsLength(String[] x, String[] y) {   
        for (int i = 0; i <= x.length; i++) {   
            c[i][0] = 0;   
        }   
        for (int i = 0; i <= y.length; i++) {   
            c[0][i] = 0;   
        }   
        for (int i = 1; i <= x.length; i++) {   
            for (int j = 1; j <= y.length; j++) {   
                if (x[i - 1].equals(y[j - 1])) {   
                    c[i][j] = c[i - 1][j - 1] + 1;   
                    b[i][j] = 0;   
                } else if (c[i - 1][j] >= c[i][j - 1]) {   
                    c[i][j] = c[i - 1][j];   
                    b[i][j] = 1;   
                } else {   
                    c[i][j] = c[i][j - 1];   
                    b[i][j] = -1;   
                }   
            }   
        }   
    }   
  
    public static void printLCS(String[] x, int m, int n) {   
        int i = m;   
        int j = n;   
        if (i == 0 || j == 0) {   
            return;   
        }   
        if (b[i][j] == 0) {   
            printLCS(x, i - 1, j - 1);   
            System.out.print(x[i - 1] + " ");   
        } else if (b[i][j] == 1) {   
            printLCS(x, i - 1, j);   
        } else {   
            printLCS(x, i, j - 1);   
        }   
    }   
}