Codeforces_282A

//Codeforces 282A
#include <iostream>
using namespace std;
int main()
{
    char a, b, c;
    int n, answ=0;
    cin >> n;
    for(int i=0;i<n;i++)
    {
        cin >> a >> b >> c;
        if(b=='+'){answ++;}
        else{answ--;}
    }
    cout << answ;
    return 0;
}