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.
import copy
import decimal
import math
import sys
import time
cyc=int(input())
sum=0
for each in range(cyc):
    curr=input()
    if curr.count("-")>0:
        sum-=1
    else:sum+=1
print(sum)