leetcode661. 图片平滑器（java）

简单题 无语死了 读题障碍第一人

java：

class Solution {
    public int[][] imageSmoother(int[][] img) {
        int m = img.length, n = img[0].length;
        int[][] ret = new int[m][n];
        for (int i = 0; i < m; i++) {
            for (int j = 0; j < n; j++) {
                int num = 0, sum = 0;
                for (int x = i - 1; x <= i + 1; x++) {
                    for (int y = j - 1; y <= j + 1; y++) {
                        if (x >= 0 && x < m && y >= 0 && y < n) {
                            num++;
                            sum += img[x][y];
                        }
                    }
                }
                ret[i][j] = sum / num;
            }
        }
        return ret;
    }
}

python3:

class Solution:
    def imageSmoother(self, img: List[List[int]]) -> List[List[int]]:
        m = len(img)
        n = len(img[0])
        ans = [[0] * n for _ in range(m)]
        for i in range(m):
            for j in range(n):
                num, ato = 0, 0
                for x in range(i - 1, i + 2):
                    for y in range(j - 1, j + 2):
                        if x >= 0 and x < m and y >= 0 and y < n:
                            num += 1
                            ato += img[x][y]
                ans[i][j] = ato // num
        return ans