CODE

class Solution:
    def flipAndInvertImage(self, image: List[List[int]]) -> List[List[int]]:
        for i in range(len(image)):
            l, r = 0, len(image) - 1
            # flip horizontal
            while l < r:
                image[i][l], image[i][r] = image[i][r], image[i][l]
                l, r = l + 1, r - 1
            # invert
            for j in range(len(image)):
                image[i][j] ^= 1
        return image