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)
