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

void solve(){
  int n;
  string f;
  cin>>n>>f;
  string s;
  vector<vector<string>> vec(2);
  int sign=0;
  int ans=0;
  for (int i=0;i<n;i++){
    if (f[i]=='+'){
      if (sign==0) ans+=9;
      vec[sign].push_back(s);
      s.clear();
      sign=0;
    }
    else if (f[i]=='-'){
      if (sign==0) ans+=9;
      vec[sign].push_back(s);
      s.clear();
      sign=1;
    }
    else if (f[i]=='*'){
      if (sign==0) ans+=9;
    }
    else{
      s+=f[i];
    }
  }
  if (!s.empty()) vec[sign].push_back(s);
  for (auto num:vec[0]) for (char c:num) ans+=9-(c-'0');
  for (auto num:vec[1]) for (char c:num) ans+=max(0,8-(9-(c-'0')));
  cout<<ans<<endl;
}

int main(){
  int t;
  cin>>t;
  while (t--) solve();
}