#include <bits/stdc++.h>

using namespace std;

int main(){
  int n, x = 0;
  string s;

  cin >> n;

  for(int i = 0; i < n; i++){
    cin >> s;

    if(s[1] == '-')
      x--;
    else
      x++;
  }

  cout << x << endl;

  return 0;
}
