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).

Input

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.

Output

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