#include <bits/stdc++.h>
using namespace std;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int T; cin >> T;
    while(T--){
        int N; cin >> N;
        string s; cin >> s;
        int answer = 0;
        bool plus = true;
        for(auto c : s){
            if(c == '+'){
                if(plus) answer += 9;
                plus = true;
            }    
            else if(c == '-'){
                if(plus) answer += 9;
                plus = false;
            }    
            else if(c == '*'){
                if(plus) answer += 9;
            }
            else{
                if(plus) answer += 9-(c-'0');
                else answer += c-'0'-1;
            }
        }
        cout << answer << "\n";
    }
}