题解 | #有效括号序列#
有效括号序列
https://www.nowcoder.com/practice/37548e94a270412c8b9fb85643c8ccc2
from re import T from math import fabs # # 代码中的类名、方法名、参数名已经指定,请勿修改,直接返回方法规定的值即可 # # # @param s string字符串 # @return bool布尔型 # class Solution: def isValid(self , s: str) -> bool: st = [] for i, c in enumerate(s): if c == '(': st.append(')') elif c == '{': st.append('}') elif c == '[': st.append(']') elif len(st) < 1: return False elif c == st[-1]: st.pop() return len(st) == 0