class Solution:
def isValid(self, s: str) -> bool:
tem=[None]
dic={")":"(", "}":"{" ,"]":"["}
for i in s:
if i in dic and dic[i]==tem[-1]:
tem.pop()
else:
tem.append(i)
tem.pop()
if tem==[]:
return True
else:
return False
class Solution:
def isValid(self, s: str) -> bool:
tem=[None]
dic={")":"(", "}":"{" ,"]":"["}
for i in s:
if i in dic and dic[i]==tem[-1]:
tem.pop()
else:
tem.append(i)
tem.pop()
if tem==[]:
return True
else:
return False