【CodeForces 282A】Bit++（水~）



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

2X++--X

Output

0

题目大意：自增自减

思路：这种大水题我还wa了一发，想抽死自己，想复杂了，以为最后一个如果是x++的话输出x自增之前的值，结果，hh

#include<iostream> #include<cstdio>using namespace std;int main(){    int n,x=0;    string s;    cin>>n;    while(n--){        cin>>s;        if(s[1]=='+') x++;        else x--;    }    cout<<x<<endl;    return 0;}