[프로그래머스 Lv2] 올바른 괄호(python, 구현)

문제 링크: https://school.programmers.co.kr/learn/courses/30/lessons/12909

프로그래머스

def solution(s):
    stack = []
    answer = False

    for i in s:
        if i == '(':
            stack.append(i)
        else:
            if not stack:
                stack.append(i)
                break
            else:
                stack.pop()

    if not stack:
        answer = True

    return answer

s = '))))'
print(solution(s))