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This paper solves the non optimal solution （ Non optimal performance ）.
Xiaohua and Xiaowei are very good friends , They agreed to have dinner together on weekends and communicate through mobile phones , They chose several places for dinner on the map （ Due to natural terrain and other reasons , Some dining places are inaccessible ）, How many dining places can Xiaohua and Xiaowei reach ？
Input description ：
First line input m and n,m Represents the length of the map ,n Represents the width of the map .
The second line starts to input the map information , The map information contains ：
0 For a smooth road
1 For obstacles （ Dan only 1 For obstacles ）
2 For Xiaohua or Xiaowei , There must be and only 2 individual （ No obstacles )
3 For the selected gathering place （ No obstacles ）
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