gistfile1.py

import math
import sys
import traceback


def minus1(x):
    return x - 1

def plus1(x):
    return x + 1

def add_pos(x, y):
    maxdepth = sys.getrecursionlimit() - len(traceback.format_stack())
    chunksize = int(math.ceil(float(x) / maxdepth))

    def recursion(x, y):
        for i in xrange(chunksize):
            if not y:
                return x
            x, y = plus1(x), minus1(y)
        return recursion(x, y)

    return recursion(x, y)