import pyutil as pyu
pyu.get_local_pyinfo()

print(pyu.ps2("python-dotenv"))

from typing import List

class Solution:
  def calculate(self, s: str) -> int:
    ans = 0
    num = 0
    sign = 1
    stack = [sign]  # stack[-1]: current env's sign

    for c in s:
      if c.isdigit():
        num = num * 10 + (ord(c) - ord('0'))
      elif c == '(':
        stack.append(sign)
      elif c == ')':
        stack.pop()
      elif c == '+' or c == '-':
        ans += sign * num
        sign = (1 if c == '+' else -1) * stack[-1]
        num = 0

    return ans + sign * num

new Solution().calculate()