Python solution--68ms


  • 0
    class Solution(object):
        def myAtoi(self, sstr):
            """
            :type str: str
            :rtype: int
            """
            # find the valid integral sequence
            inputs = sstr.strip(' ')
            valid_str =  ['-', '+']
            tmp_str = ''
            for i, item in enumerate(inputs):
                if item not in valid_str and not item.isdigit():
                    break
                tmp_str += item
            # process exception
            try:
                int_str = int(tmp_str)
                return max(-2**31, min(int_str, 2**31-1))
            except Exception:
                return 0
    

    I just process the invalid value for int() by code block try...exception, 68ms


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