282A.cpp

//282A.cpp
//A. Bit++
//Author: Ikki
//May 31, 2015

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

int main()
{
	int n, x = 0;
	cin >> n;
	for (int i = 0; i < n;i++)
	{
		string str;
		cin >> str;
		if (str.find('+') != string::npos)
			x++;
		else
			x--;
	}
	cout << x << endl;
	return 0;
}