Parsers often need to turn user input into a number, even when the text has spaces or extra characters after the number. Write a function my_atoi that behaves like atoi: skip leading spaces, read an optional sign, then read digits until the first non-digit character. Return the parsed integer. If it goes outside the 32-bit signed integer range [-2**31, 2**31 - 1], clamp it to the nearest boundary.

def my_atoi(s: str) -> int: