#include <iostream>
#include <string>
using namespace std;

int main() {
	int i, n, j, count=0;
	string s;
	cin>>n;
	getline(cin,s);
	for (i=0; i<n; i++) {
		getline(cin,s);
		if (s[0] == '+' || s[1] == '+' || s[3] == '+') count++;
		if (s[0] == '-' || s[1] == '-' || s[3] == '-') count--;
	}
	cout<<count;
}