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.

Example 1:

    Input: operations = ["--X","X++","X++"]
    Output: 1
    Explanation: The operations are performed as follows:
    Initially, X = 0.
    --X: X is decremented by 1, X =  0 - 1 = -1.
    X++: X is incremented by 1, X = -1 + 1 =  0.
    X++: X is incremented by 1, X =  0 + 1 =  1.

Example 2:

    Input: operations = ["++X","++X","X++"]
    Output: 3
    Explanation: The operations are performed as follows:
    Initially, X = 0.
    ++X: X is incremented by 1, X = 0 + 1 = 1.
    ++X: X is incremented by 1, X = 1 + 1 = 2.
    X++: X is incremented by 1, X = 2 + 1 = 3.

Example 3:

    Input: operations = ["X++","++X","--X","X--"]
    Output: 0
    Explanation: The operations are performed as follows:
    Initially, X = 0.
    X++: X is incremented by 1, X = 0 + 1 = 1.
    ++X: X is incremented by 1, X = 1 + 1 = 2.
    --X: X is decremented by 1, X = 2 - 1 = 1.
    X--: X is decremented by 1, X = 1 - 1 = 0.

Constraints:

- `1 <= operations.length <= 100`
- `operations[i]` will be either `"++X"`, `"X++"`, `"--X"`, or `"X--"`.