Valid Parentheses
2024-08-25 05:25:18
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.
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class Solution {
public:
bool isValid(string s) {
stack<char> store;
for (auto c : s) {
if (c == '(' || c == '{' || c == '[')
store.push(c);
else {
if (store.empty()) return false;
if (c == ')' && store.top() == '('){
store.pop();
}
else if (c == '}' && store.top() == '{'){
store.pop();
}
else if (c == ']' && store.top() == '['){
store.pop();
}
else
return false;
}
}
return store.empty();
}
};
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