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.
class Solution {
public:
bool isValid(string s) {
bool f = true;
while (!s.empty()&&f)
{
f=false;
int i = 0;
while (!s.empty() && i < s.length() - 1)
{
if (s[i] == '('&&s[i + 1] == ')' || s[i] == '['&&s[i + 1] == ']'
|| s[i] == '{'&&s[i + 1] == '}')
{
f = true;
s.erase(i, 2);
}
else
i++;
}
}
return s.empty();
}
};
accepted