Code Signal_练习题_Minesweeper

In the popular Minesweeper game you have a board with some mines and those cells that don't contain a mine have a number in it that indicates the total number of mines in the neighboring cells. Starting off with some arrangement of mines we want to create a Minesweeper game setup.

Example

For

matrix = [[true, false, false],
          [false, true, false],
          [false, false, false]]

the output should be

minesweeper(matrix) = [[1, 2, 1],
                       [2, 1, 1],
                       [1, 1, 1]]

Check out the image below for better understanding:

不会做.....

def minesweeper(matrix):
    r = []

    for i in range(len(matrix)):
        r.append([])
        for j in range(len(matrix[0])):
            l = -matrix[i][j]
            for x in [-1, 0, 1]:
                for y in [-1, 0, 1]:
                    if 0 <= i + x < len(matrix) and 0 <= j + y < len(matrix[0]):
                        l += matrix[i + x][j + y]

            r[i].append(l)
    return r

膜拜大佬