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Valid Parentheses.cpp
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Valid Parentheses.cpp
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class Solution {
vector<char> my_stack;
public:
bool isValid(string s) {
if (s.size() % 2 != 0)
return false;
if (s.size() == 0)
return true;
for (int i = 0; i < s.size(); i++)
{
my_stack.push_back(s[i]);
if (my_stack[my_stack.size() - 1] == '}')
{
if (my_stack.size() > 1){
if(my_stack[my_stack.size() - 2] == '{')
{
my_stack.pop_back();
my_stack.pop_back();
}
}
}
else if (my_stack[my_stack.size() - 1] == ')')
{
if (my_stack.size() > 1){
if(my_stack[my_stack.size() - 2] == '(')
{
my_stack.pop_back();
my_stack.pop_back();
}
}
}
else if (my_stack[my_stack.size() - 1] == ']')
{
if (my_stack.size() > 1){
if(my_stack[my_stack.size() - 2] == '[')
{
my_stack.pop_back();
my_stack.pop_back();
}
}
}
}
if (!my_stack.empty())
return false;
return true;
}
};