#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, c = 0;
  cin >> n;
  char a[n][3];
  for (int i = 0; i < n; i++) {
    cin >> a[i];
    if (a[i][1] == '+')
      c++;
    else if (a[i][1] == '-')
      c--;
  }
  cout << c;
}
