344.py

def reverseString(s: list[str]) -> None:
    """
    Do not return anything, modify s in-place instead.
    """
    i = 0
    j = len(s) - 1
    while i <= j:
        s[i], s[j] = s[j], s[i]
        i += 1
        j -= 1

    print(s)

reverseString(["h","e","l","l","o"])