Leetcode 20 Valid Parentheses
2015-05-18 12:07
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class Solution:
# @param {string} s
# @return {boolean}
def isValid(self, s):
Length = len(s)
List = []
for i in range(Length):
if s[i] == '(' or s[i] == '[' or s[i] == '{':
List.append(s[i])
if s[i] == ')':
if List == [] or List.pop() != '(': return False
if s[i] == ']':
if List == [] or List.pop() != '[': return False
if s[i] == '}':
if List == [] or List.pop() != '{': return False
if List: return False
else: return True
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