import java.util.*;
import java.io.*;

public class Sokkelo {
    public static void main(String[] args) throws Exception {
        int n = 50;
        Scanner tiedosto = new Scanner(new File("sokkelo.txt"));
        long[][] reitit = new long[n][n];
        reitit[0][0] = 1;
        for (int i = 0; i < n; i++) {
            String rivi = tiedosto.nextLine();
            for (int j = 0; j < n; j++) {
                char merkki = rivi.charAt(j);
                if (merkki == '0') {
                    reitit[i][j] += (i > 0) ? reitit[i-1][j] : 0;
                    reitit[i][j] += (j > 0) ? reitit[i][j-1] : 0;
                }
            }
        }
        System.out.println(reitit[n-1][n-1]);
    }
}