A8921. Bit++

The classic programming language of Bitland is Bit++. This language is so peculiar and complicated.

The language is that peculiar as it has exactly one variable, called $x$ . Also, there are two operations:

- Operation ++ increases the value of variable $x$ by 1.
- Operation -- decreases the value of variable $x$ by 1.

A statement in language Bit++ is a sequence, consisting of exactly one operation and one variable $x$ . The statement is written without spaces, that is, it can only contain characters "+", "-", "X". Executing a statement means applying the operation it contains.

A programme in Bit++ is a sequence of statements, each of them needs to be executed. Executing a programme means executing all the statements it contains.

You're given a programme in language Bit++. The initial value of $x$ is $0$ . Execute the programme and find its final value (the value of the variable when this programme is executed).

The first line contains a single integer $n$ $(1<=n<=150)$ — the number of statements in the programme.

Next $n$ lines contain a statement each. Each statement contains exactly one operation (++ or --) and exactly one variable $x$ (denoted as letter «X»). Thus, there are no empty statements. The operation and the variable can be written in any order.

Print a single integer — the final value of $x$ .