size
7 7
map
2 2 2 2 2 2 2
2 0 0 0 0 0 2
2 0 0 1 0 0 2
2 0 0 1 1 0 2
2 1 1 2 2 2 2
2 0 0 0 0 0 2
2 2 2 2 2 2 2