282A. Bit++

282A. Bit++

282A. Bit++

• time limit per test1 second
• memory limit per test256 megabytes
• inputstandard input
• outputstandard output

The classic programming language of Bitland is Bit++. This language is so peculiar and complicated.

Bitland的经典编程语言是Bit++。这种语言是如此奇特和复杂。

The language is that peculiar as it has exactly one variable, called x. Also, there are two operations:

这种语言非常独特，因为它只有一个变量，叫做x。此外，有两种操作：

• Operation ++ increases the value of variable x by 1.

Operation++将变量x的值增加1。

• Operation -- decreases the value of variable x by 1.

操作--将变量x的值减少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.

Bit++语言中的语句是一个序列，只包含一个操作和一个变量x。该语句不带空格，即只能包含字符“+”、“-”、“x”。执行语句意味着应用它包含的操作。

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.

Bit++中的程序是一系列语句，每个语句都需要执行。执行一个程序意味着执行它包含的所有语句。

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).

你得到了一个用Bit++语言编写的程序。x的初始值为0。执行该程序并找到其最终值（执行该程序时变量的值）。

Input

The first line contains a single integer n (1 ≤ n ≤ 150) — the number of statements in the programme.

第一行包含一个整数n（1 ≤ n ≤ 150）-节目中的发言次数。

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.

接下来的n行分别包含一条语句。每个语句只包含一个运算（++或--）和一个变量x（表示为字母«x»）。因此，不存在空语句。操作和变量可以按任意顺序写入。

Output

Print a single integer — the final value of x.

打印一个整数——x的最终值。

Examples

input1

1

++X

output1

1

input2

2

X++

--X

output2

0

Solution

考虑到X++或者++X在第二位上都是+，X--或者--X在第二位上都是-，因此只要对第二位进行判断为+还是-即可

Code

#include <iostream>
using namespace std;

//282A. Bit++
int main() {
    int n = 0;//n：发言次数
    cin >> n;
    int x =0;//x：x的最终值
    for(int i = 0;i < n;i++){
        string str;
        cin >> str;
        if(str[1]=='+'){
            x++;
        }else{
            x--;
        }
    }
    cout << x << endl;
    return 0;
}