Posted on 2023-04-10 15:10
Uriel 閱讀(46)
評論(0) 編輯 收藏 引用 所屬分類:
閑來無事重切Leet Code 、
大水題
判斷由{[()]}組成的字符串是否合法（能匹配上），簡單棧操作
1 #20
2 #Runtime: 18 ms (Beats 66.75%)
3 #Memory: 13.7 MB (Beats 36.29%)
4
5 class Solution(object):
6 def isValid(self, s):
7 """
8 :type s: str
9 :rtype: bool
10 """
11 par_stk = []
12 for i in s:
13 if i == ')' and len(par_stk) > 0 and par_stk[-1] == '(':
14 par_stk.pop()
15 continue
16 if i == '}' and len(par_stk) > 0 and par_stk[-1] == '{':
17 par_stk.pop()
18 continue
19 if i == ']' and len(par_stk) > 0 and par_stk[-1] == '[':
20 par_stk.pop()
21 continue
22 par_stk.append(i)
23 if par_stk:
24 return False
25 return True