A. Bit++

time limit per test

2 seconds

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.

Sample test(s)

input

1
++X

output

1

input

2
X++
--X

output

0

解题说明：就类似C语言中的自增自减操作，水题

#include <iostream>
#include<cstdio>
#include<cstring>
#include<cmath>
using namespace std;

int main()
{
	int n,i;
	char a[4];
	int x;
	x=0;
	scanf("%d",&n);
	for(i=0;i<n;i++)
	{
		scanf("%s",&a);
		if(a[0]=='+'||a[1]=='+')
		{
			x++;
		}
		else if(a[0]=='-'||a[1]=='-')
		{
			x--;
		}
	}
	printf("%d\n",x);
    return 0;
}