957. Prison Cells After N Days - LeetCode Solution

class Solution:
    def prisonAfterNDays(self, cell: List[int], n: int) -> List[int]:

        l = []

        count =0

        for i in range(n):

            r = []
            r.append(0)

            for j in range(1, len(cell) - 1, 1):
                if cell[j - 1] == cell[j + 1]:
                    r.append(1)

                else:
                    r.append(0)

            r.append(0)

            cell = r

            l.append(cell)

            if l[0] == cell and count!= 0:
                l.pop()
                break
            count=1




        return l[n%len(l) -1]