问题描述:
Write a function to find the longest palindromic subsequence in the given string.

测试用例:
['assert lps("TENS FOR TENS") == 5 ', 'assert lps("CARDIO FOR CARDS") == 7', 'assert lps("PART OF THE JOURNEY IS PART") == 9 ']

生成的代码:
def lps(s):
    s = s.replace(" ", "").upper()  # Remove spaces and convert to uppercase
    n = len(s)
    
    dp = [[0] * n for _ in range(n)]
    
    for i in range(n):
        dp[i][i] = 1  # Every single character is a palindrome of length 1

    for length in range(2, n + 1):  # Length of the substring
        for i in range(n - length + 1):
            j = i + length - 1
            if s[i] == s[j]:
                dp[i][j] = dp[i + 1][j - 1] + 2
            else:
                dp[i][j] = max(dp[i + 1][j], dp[i][j - 1])

    return dp[0][n - 1]

# Test cases
assert lps("TENS FOR TENS") == 5 
assert lps("CARDIO FOR CARDS") == 7
assert lps("PART OF THE JOURNEY IS PART") == 9