Minesweeper is a very classic
stand-alone game. The essence of it is to judge whether the unopened grid is a
mine by the number of surrounding mines that have been given from the opened
grids.
Now given the mine distribution in the
minefield of n rows and m columns, and calculate the number of mines around
each grid which does not have mine.
Note: There are eight grids around each
grid: up, down, left, right, top left, top right, bottom left, bottom right.
The first line contains two integers, n
and m, which represent the number of rows and columns of the minefield. 1 <=
n <= 100, 1 <= m <= 100. The next n lines have m characters per line,
‘*’ means that the corresponding grid is a mine, ‘? ’ indicates that there is
no mine in the corresponding grid. There are no separators between characters.
Output n lines, m characters per line,
describing the entire minefield. If the corresponding grid is a mine, then represent
it by ‘*’, otherwise represent the grid by the number of surrounding mines.
There are no separators between characters.
3 3
*??
???
?*?
*10
221
1*1