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Given a string containing just the characters ‘(‘
, ‘)‘
, ‘{‘
, ‘}‘
, ‘[‘
and ‘]‘
, determine if the input string is valid.
The brackets must close in the correct order, "()"
and "()[]{}"
are all valid but "(]"
and "([)]"
are not.
思路1:
利用栈
注意点:什么情况不正确,各种测试用例,vector容器得到最后元素使用back();
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原文地址:http://www.cnblogs.com/lhxandcxy/p/5395437.html