solution using python re

  • 0

    You need consider following cases:

    1. invalid input
    2. leading whitespaces
    3. overflow
    class Solution(object):
        def myAtoi(self, str):
            :type str: str
            :rtype: int
            import re
            p = re.compile(r'^[+-]?[0-9]+')
            m = re.match(p, str.strip())
            if m:
                ret = int(
                if ret < -0x80000000:
                    return -0x80000000
                elif ret > 0x7fffffff:
                    return 0x7fffffff
                return ret
                return 0

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