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OI-codes/Luogu/UVA673/UVA673.cpp

32 lines
702 B
C++

#include <bits/stdc++.h>
using namespace std;
int main() {
int t;
cin >> t;
getchar();
while (t--) {
string s;
stack<char> st;
getline(cin, s);
for (int i = 0; i < s.size(); i++) {
if (s[i] == '(' || s[i] == '[') {
st.push(s[i]);
} else if (st.empty() || s[i] == ')' && st.top() != '(' || s[i] == ']' && st.top() != '[') {
cout << "No" << endl;
goto end;
} else {
st.pop();
}
}
if (st.empty()) {
cout << "Yes" << endl;
} else {
cout << "No" << endl;
}
end:;
}
return 0;
}