| Problem B: Minesweeper |
Have you ever played Minesweeper? It's a cute little game which comes within a certain Operating System which name we can't really remember. Well, the goal of the game is to find where are all the mines within a MxN field. To help you, the game shows a number in a square which tells you how many mines there are adjacent to that square. For instance, supose the following 4x4 field with 2 mines (which are represented by an * character):
*... .... .*.. ....If we would represent the same field placing the hint numbers described above, we would end up with:
*100 2210 1*10 1110As you may have already noticed, each square may have at most 8 adjacent squares.
The input will consist of an arbitrary number of fields. The first line of each field contains two integers n and m (0 < n,m <= 100) which stands for the number of lines and columns of the field respectively. The next n lines contains exactly m characters and represent the field. Each safe square is represented by an "." character (without the quotes) and each mine square is represented by an "*" character (also without the quotes). The first field line where n = m = 0 represents the end of input and should not be processed.
For each field, you must print the following message in a line alone:
Field #x:Where x stands for the number of the field (starting from 1). The next n lines should contain the field with the "." characters replaced by the number of adjacent mines to that square. There must be an empty line between field outputs.
4 4 *... .... .*.. .... 3 5 **... ..... .*... 0 0
Field #1: *100 2210 1*10 1110 Field #2: **100 33200 1*100