import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;

public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int t = Integer.parseInt(br.readLine());
		PrintWriter pw = new PrintWriter(System.out);
		for (int z = 0; z < t; z++) {
			int n = Integer.parseInt(br.readLine());
			char[] f = br.readLine().toCharArray();

			int ans = 0;
			boolean m = false;
			for (int i = 0; i < n; i++) {
				if (f[i] == '-') {
					if (!m) {
						ans += 9;
					}
					m = true;
				} else if (f[i] == '+') {
					if (!m) {
						ans += 9;
					}
					m = false;
				} else if (f[i] == '*') {
					if (!m) {
						ans += 9;
					}
				} else {
					int c = f[i] - '0';
					if (m) {
						ans += c - 1;
					} else {
						ans += 9 - c;
					}
				}
			}
			pw.println(ans);
		}
		pw.flush();
		br.close();

		
	}
}