考虑存储为numpy数组的下图: a = [[0,0,0,0,0,1,1,0,0,0],
[0,0,0,0,1,1,1,1,0,0],
[0,0,0,0,0,1,1,0,0,0],
[0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,2,0,0,0,0],
[0,0,0,0,0,2,2,0,0,0],
[0,0,0,0,0,2,0,0,0,0],
[0,0,0,0,3,3,3,0,0,0],
[4,0,0,0,0,0,0,0,0,0],
[4,4,0,0,0,0,0,0,0,0],