Leetcode Problem 2390. Removing Stars From a String

Algorithm

1. Initialize an empty stack st.
2. Iterate over each character c in the string s.
   • If c is a non-star character, push c onto st.
   • If c is a star, pop the top character from st.
3. Initialize an empty string result.
4. While st is not empty, pop characters from st and prepend them to result.
5. Return result as the final string after all stars have been processed.