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37 lines (33 loc) · 886 Bytes
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Copy path20.cpp
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37 lines (33 loc) · 886 Bytes
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#include<iostream>
#include<stack>
using namespace std;
class Solution {
public:
bool isValid(string s) {
stack<int> stac;
for(int i = 0; i < s.size(); i++) {
if(s[i] == '(' || s[i] == '[' || s[i] == '{')
stac.push(s[i]);
else {
if(stac.empty())
return false;
if(s[i] == ')') {
if(stac.top() != '(')
return false;
}
else if(s[i] == ']') {
if(stac.top() != '[')
return false;
}
else if(s[i] == '}') {
if(stac.top() != '{')
return false;
}
stac.pop();
}
}
return stac.empty() ? true : false;
}
};
int main() {
}