a-bit++.py

# Max Base
# github.com/BaseMax
'''
A. Bit++
	time limit per test: 1 second
	memory limit per test: 256 megabytes
	input: standard input
	output: standard output

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.

# Examples

## Input
1
++X
## Output
1

## Input
2
X++
--X
## Output
0
'''
count=int(input())
x=0
for i in range(0, count):
	text=input().lower().strip()
	if text == "++x":
		x+=1
	elif text == "x++":
		x+=1
	elif text == "--x":
		x-=1
	elif text == "x--":
		x-=1
print(x)