2011-Final-Value-of-Variable-After-Performing-Operations.py

'''
There is a programming language with only four operations and one variable X:

++X and X++ increments the value of the variable X by 1.
--X and X-- decrements the value of the variable X by 1.
Initially, the value of X is 0.

Given an array of strings operations containing a list of operations, return the final value of X after performing all the operations.
'''

class Solution:
    def finalValueAfterOperations(self, operations: List[str]) -> int:
        ans = 0
        for operation in operations:
            if(operation == "++X" or operation == "X++"):
                ans += 1
            else:
                ans -= 1
        return ans