Make The String Great LeetCode solution in C++

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class Solution {
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 public:
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  string makeGood(string s) {
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    stack<char> st;
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    st.push(s[0]);
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    string ans = "";
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    for (int i = 1; i < s.size(); ++i) {
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      if (!st.empty() and (st.top() == s[i] + 32 or st.top() == s[i] - 32)) {
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        cout << "top :" << st.top() << endl;
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        st.pop();
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      }
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      else {
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        st.push(s[i]);
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      }
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    }
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    while (!st.empty()) {
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      // cout<<st.top()<<"";
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      ans += st.top();
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      st.pop();
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    }
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    reverse(ans.begin(), ans.end());
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    return ans;
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  }
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};