Problem Statement

Rahaf wants to create a game using programming.
The game starts with a position P.
The player then can make three moves: M1, M2 and M3. These moves can be one of two, forward + or backward -.

For example, if you start with position 5, and use the moves + + -, then you will end up in position 6.

Constraints

• N is an integer between 10 and 100
• M1, M2 and M3 are strings that can be either + or -

Input

Input is in the following format:

N
M1
M2
M3

All inputs to be captured first then processed.

Output

Print the final position as an integer

Samples

Sample 1

Sample 2

Sample 3