CF 282A

#include<iostream>
#include<cstring>
#define debug(x) cout<<">"<<x<<endl;

using namespace std;

int main()
{
 int n,x;
 string s;
 
 while(cin>>n)
 {
  x=0;
  while(n--)
  {
   cin>>s;
   if(s=="X++" || s=="++X") x++;
   else if(s=="X--" || s=="--X") x--;
  }
  cout<<x<<endl;
 }
 
 return 0;
}