有有一间长方形的房子 ，，地上铺了红

色、黑色两种颜色的正方形瓷砖。你站在其中

一块黑色的瓷砖上块黑色的瓷砖上，，只能向相邻的黑色瓷砖移只能向相邻的黑色瓷砖移

动。请写一个程序，计算你总共能够到达多少

块黑色的瓷砖块黑色的瓷砖

-There are a rectangular house between the rectangular house, to spread the red floor is covered with red and black colors of square tiles. You stand on a black tile on which the black tiles on the block, and can only move to the adjacent black tiles, black tiles can move to the adjacent. Write a program to calculate how many blocks you can reach a total black block black tiles tiles