solution.py

"""This problem was asked by Facebook.

Given a string consisting of parentheses, single digits, and positive and negative signs, convert the string into a mathematical expression to obtain the answer.

Don't use eval or a similar built-in parser.

For example, given '-1 + (2 + 3)', you should return 4."""


def add(a, b):
    return a + b


print(add(3, 5))