mmirz719

import fileinput
from itertools import permutations, combinations_with_replacement


def challenge(challenge_str):
    the_split = challenge_str.strip().split(' ')
    if len(the_split) < 2:
        print 'Invalid'
        return
    for d in the_split:

mmirz719

# look, it's art. okay? it's art about how functional programming in Python is sometimes ugly
#
# it just so happens this art has a terrible worst-case complexity.
#

from itertools import chain, izip_longest, product, permutations
import operator
import sys

operators = (operator.add, operator.sub, operator.mul, operator.truediv)

mmirz719

import itertools, re, sys

ops = (lambda x, y: x + y, lambda x, y: x - y, lambda x, y: x * y, lambda x, y: x / y)

def recurse(so_far, operands, desired):
    if not operands:
        return '' if so_far == desired else None
    for op, op_char in itertools.izip(ops, '+-*/'):
        expr = recurse(op(so_far, operands[0]), operands[1:], desired)
        if isinstance(expr, basestring):