#include <bits/stdc++.h>
using namespace std;
const double pi = acos(-1.0);
const double eps = 1e-11;
template <class T>
inline void ckmin(T &a, T b) {
  if (b < a) a = b;
}
template <class T>
inline void ckmax(T &a, T b) {
  if (b > a) a = b;
}
template <class T>
inline T sqr(T x) {
  return x * x;
}
int main() {
  int t;
  cin >> t;
  string s;
  int ans = 0;
  while (t--) {
    cin >> s;
    if (s[0] == '+' || s[2] == '+')
      ans++;
    else if ((s[0] == '-' || s[2] == '-'))
      ans--;
  }
  cout << ans;
}

### Prompt

Your challenge is to write a CPP solution to the following problem:

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.

Examples

Input

1
++X


Output

1


Input

2
X++
--X


Output

0

### Response

```cpp
#include <bits/stdc++.h>
using namespace std;
const double pi = acos(-1.0);
const double eps = 1e-11;
template <class T>
inline void ckmin(T &a, T b) {
  if (b < a) a = b;
}
template <class T>
inline void ckmax(T &a, T b) {
  if (b > a) a = b;
}
template <class T>
inline T sqr(T x) {
  return x * x;
}
int main() {
  int t;
  cin >> t;
  string s;
  int ans = 0;
  while (t--) {
    cin >> s;
    if (s[0] == '+' || s[2] == '+')
      ans++;
    else if ((s[0] == '-' || s[2] == '-'))
      ans--;
  }
  cout << ans;
}

```