kyon0304

#!/usr/bin/env python
#-*- coding: utf-8 -*-

import urllib
import urllib2

def safe_add(x, y):
    lsw=(x&0xFFFF)+(y&0xFFFF)
    msw=(x>>16)+(y>>16)+(lsw>>16)
    return lshift(msw, 16)|(lsw&0xFFFF)