I have a question what do I output, the sum of importance
or just a piece of land's importance?

The example is that:
 3   2   0   0   0
 2   2   0 100 100
 2   2   0 100 100
94  94   0   0   0
94  94   0   0 255

we have to select a land whose area is 3*3,how can I just
expropriate the land whose importance is 3?

I think the least importance is 3+2+2=7.


Thank you for answering my question?

the biggest is 3