CF282A 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

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