Method remove

solution/0400-0499/0488.Zuma Game/Solution.py:3–9

(s)

class Solution:
    def findMinStep(self, board: str, hand: str) -> int:
        def remove(s):
            while len(s):
                next = re.sub(r'B{3,}|G{3,}|R{3,}|W{3,}|Y{3,}', '', s)
                if len(next) == len(s):
                    break
                s = next
            return s

        visited = set()
        q = deque([(board, hand)])