[CodeForces][JAVA] 282A. Bit++

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
 
 
class Solution {
        
    private static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    private static BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
    
    public static void main(String[] args) throws IOException{
        int N = Integer.parseInt(br.readLine());
        int result =0;
        for(int i=0; i<N; i++) {
            String input = br.readLine();
            if(input.contains("+")) result++;
            else result--;
            
        }
        bw.write(String.valueOf(result));
        bw.flush();
        
        
    }
}