Minimum numbers of toggles to turn all the light bulbs on

minimum_bulbs.py

class Solution(object):

    def solve(self, a):
        is_flip_on = False
        flips = 0

        for n in a:
            if not is_flip_on and n == 1:
                continue
            elif is_flip_on and n == 0:
                continue
            elif not is_flip_on and n == 0:
                flips += 1
                is_flip_on = not is_flip_on
            elif is_flip_on and n == 1:
                flips += 1
                is_flip_on = not is_flip_on

        return flips


if __name__ == "__main__":
    a = [0, 0, 0, 1]
    ans = Solution().solve(a)
    print(ans)