Bit++

Time Limit:2000MS     Memory Limit:262144KB     64bit IO Format:%I64d & %I64u

Submit Status Practice CodeForces 282A

Description

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 Input

1
++X

1

2
X++
--X

0

水题，注意++和--怎么比较表示

代码：

#include<stdio.h>
#include<string.h>
#include<stdlib.h>
int main()
{
    char s[5];
    int x,n;
    while(~scanf("%d",&n))
    {
        x=0;
        while(n--)
        {
            scanf("%s",s);
            if(s[0]=='+'||s[1]=='+')
               x++;
            else if(s[0]=='-'||s[1]=='-')
                x--;   
        }
        printf("%d
",x);
    }
    return 0;
}