CF 282A bit++

极其水的一道语法题；

就是输入然后判断增加减少；

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 variablex by 1.
• Operation -- decreases the value of variablex by 1.

A statement in language Bit++ is a sequence, consisting of exactly one operation and one variablex. 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

AC代码：

#include <bits/stdc++.h>
using namespace std ;
int main()
{
	char a[4];
	int x  = 0 ;
	int n ;
	cin>>n; 
	while(n--)
	{
		cin>>a;
		if(a[0]=='+'||a[1]=='+')
		{
			x++;
		}
		else if(a[0]=='-'||a[1]=='-')
		{
			x--;
		}
	 } 
	 cout<<x<<endl;
	 return 0 ;
	
}