def myAtoi(str): s = str.strip() if not s: return 0 if s[0] in '-+': sign = {'-':-1,'+':1}[s[0]] s = s[1:] else: sign = 1 n = sign * digits2int_b(iter_digit(s)) return overflow32(n)
def atoi(str): s = str.strip() if not s: return 0 if s[0] in '-+': sign = {'-': -1, '+': 1}[s[0]] s = s[1:] else: sign = 1 n = sign * digits2int_b(iter_digit(s)) return overflow32(n)
def divide(dividend, divisor): s = sign(dividend) * sign(divisor) q, r = divide_step(abs(dividend), abs(divisor), 1) return overflow32(s * q)
def divide(dividend, divisor): s = sign(dividend) * sign(divisor) q, r = divide_step(abs(dividend), abs(divisor), 1) return overflow32(s*q)
def reverse(x): n = sign(x) * digits2int_b(int2digits(abs(x))) return overflow32(n, 0, 0)