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c_cpp
a year ago
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#include <bits/stdc++.h>
using namespace std;

int main()
{
    int n;
    cin >> n;
    for (int i = 0; i < n; i++)
    {
        stack<char> st;
        string str;
        cin >> str;
        for (char x : str)
        {
            if (x == '(' || x == '[')
                st.push(x);
            else if (x == ')' && st.top() == '(')
                st.pop();
            else if (x == ']' && st.top() == '[')
                st.pop();
            else
                st.push(x);
        }
        if (st.empty())
            cout << "Y";
        else
            cout << "N";
        if (i < n - 1)
            cout << "\n";
    }
}
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