import java.util.HashMap;
import java.util.Scanner;
 
public class Main{
 
	public static void main(String[] args){
		Scanner s = new Scanner(System.in);
		int n = s.nextInt();
 
		for(int i=0;i<n;i++){
			int N = s.nextInt();
			HashMap<String, Integer> map = new HashMap<String, Integer>();
			int sum =0;
			for(int j=0;j<N;j++){
				String  userid = s.next();
				String vote = s.next();
				if(vote.equals("+"))
					map.put(userid, 1);
				else map.put(userid, -1);
 
			}
 
			for(Integer value : map.values()){
				sum = sum + value;
			}
			System.out.println(sum);
		}
	}
}

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3
4
tilak +
tilak +
tilak -
tilak +
3
ratna +
shashi -
ratna -
3
bhavani -
bhavani +
bhavani -