# Solving Leetcode Interviews in Seconds with AI: Remove Palindromic Subsequences


	# Introduction
	In this blog post, we will explore how to solve the LeetCode problem "1332" using AI. LeetCode is a popular platform for preparing for coding interviews, and with the help of AI tools like [Chatmagic](https://www.chatmagic.app), we can generate solutions quickly and efficiently - helping you pass the interviews and get the job offer without having to study for months.

	# Problem Statement
	> You are given a string s consisting only of letters 'a' and 'b'. In a single step you can remove one palindromic subsequence from s. Return the minimum number of steps to make the given string empty. A string is a subsequence of a given string if it is generated by deleting some characters of a given string without changing its order. Note that a subsequence does not necessarily need to be contiguous. A string is called palindrome if is one that reads the same backward as well as forward.   Example 1:  Input: s = "ababa" Output: 1 Explanation: s is already a palindrome, so its entirety can be removed in a single step.  Example 2:  Input: s = "abb" Output: 2 Explanation: "abb" -> "bb" -> "".  Remove palindromic subsequence "a" then "bb".  Example 3:  Input: s = "baabb" Output: 2 Explanation: "baabb" -> "b" -> "".  Remove palindromic subsequence "baab" then "b".    Constraints:  1 <= s.length <= 1000 s[i] is either 'a' or 'b'.  

	# Explanation
	Here's the breakdown of the solution:

*   **Palindrome Check:** Determine if the input string `s` is already a palindrome. If it is, only one step is needed.
*   **Non-Palindrome Case:** If `s` is not a palindrome, since it only contains 'a' and 'b', any subsequence of only 'a's or only 'b's will always be a palindrome. In the worst case, we can remove all 'a's in one step, leaving only 'b's, which also form a palindrome, thus requiring a second step.
*   **Empty String:** If the input string is empty, return 0

*   **Runtime & Storage Complexity:**
    *   Runtime: O(n), where n is the length of the string `s`.
    *   Storage: O(1).

	
	# Code
	```python
	def remove_palindrome_sub(s: str) -> int:
    """
    Given a string s consisting only of letters 'a' and 'b'.
    In a single step you can remove one palindromic subsequence from s.
    Return the minimum number of steps to make the given string empty.

    Args:
        s (str): The input string consisting of 'a' and 'b'.

    Returns:
        int: The minimum number of steps to make the string empty.
    """
    if not s:
        return 0

    if s == s[::-1]:
        return 1
    else:
        return 2
	```