Algoverse_adesh_16

class Solution:
    def convert(self, s: str, numRows: int) -> str:
        if numRows == 1:
            return s

        a = [""] * numRows

        x = 0
        count = 1
        for i in s:
            a[x] += i
            if x == 0:
                count = 1
            elif x == numRows - 1:
                count = -1

            x += count

        ans = "".join(a)
        return ans