### https://theweeklychallenge.org/blog/perl-weekly-challenge-323/
"""

Task 1: Increment Decrement

Submitted by: [47]Mohammad Sajid Anwar
     __________________________________________________________________

   You are given a list of operations.

   Write a script to return the final value after performing the given
   operations in order. The initial value is always 0.
Possible Operations:
++x or x++: increment by 1
--x or x--: decrement by 1

Example 1

Input: @operations = ("--x", "x++", "x++")
Output: 1

Operation "--x" =>  0 - 1 => -1
Operation "x++" => -1 + 1 =>  0
Operation "x++" =>  0 + 1 =>  1

Example 2

Input: @operations = ("x++", "++x", "x++")
Output: 3

Example 3

Input: @operations = ("x++", "++x", "--x", "x--")
Output: 0

Operation "x++" => 0 + 1 => 1
Operation "++x" => 1 + 1 => 2
Operation "--x" => 2 - 1 => 1
Operation "x--" => 1 - 1 => 0

Task 2: Tax Amount
"""
### solution by pokgopun@gmail.com

def id(ops: tuple[str]) -> int:
    v = 0
    for op in ops:
        for sig in (op[0],op[-1]):
            if sig == "-":
                v -= 1
            elif sig == "+":
                v += 1
            else:
                continue
            break
    return v

import unittest

class TestId(unittest.TestCase):
    def test(self):
        for inpt, otpt in {
                ("--x", "x++", "x++"): 1,
                ("x++", "++x", "x++"): 3,
                ("x++", "++x", "--x", "x--"): 0,
                }.items():
            self.assertEqual(id(inpt),otpt)

unittest.main()