Zigzag - ChatGPT

class Solution(object):
   def convert(self, s, numRows):
       """
       :type s: str
       :type numRows: int
       :rtype: str
       """
    if numRows == 1 or numRows >= len(s):
           return s

       # Create a list of strings to store characters in each row
       rows = [''] * numRows

       # Initialize variables for tracking the current row and direction
       current_row = 0
       direction = 1

       # Iterate through each character in the string
       for char in s:
           # Append the character to the current row
           rows[current_row] += char

           # Update the current row and direction
           current_row += direction

           # Change direction when reaching the top or bottom row
           if current_row == 0 or current_row == numRows - 1:
               direction *= -1

       # Concatenate rows to form the zigzag pattern
       return ''.join(rows)