#nullable enable

#region
var (_input, _iter) = (Array.Empty<string>(), 0);
string String()
{
    while (_iter >= _input.Length) (_input, _iter) = (Console.ReadLine()!.Split(' '), 0);
    return _input[_iter++];
}
T I<T>() where T : IParsable<T> => T.Parse(String(), null);
#endregion

var ans = new List<int>();
var t = I<int>();
while (t-- > 0)
{
    var n = I<int>();
    var f = String();
    var pz = new bool[n];
    var sign = true;
    for (var i = 0; i < n; i++)
    {
        pz[i] = sign;
        if (f[i] == '-') sign = false;
        if (f[i] == '+') sign = true;
    }
    var tns = 0;
    for (var i = 0; i < n; i++)
    {
        var c = f[i];
        if (c == '+' || c == '-' || c == '*')
        {
            c = '0';
        }
        var cv = c - '0';
        if (pz[i]) tns += 9 - cv;
        else tns += Math.Max(0, cv - 1);
    }
    ans.Add(tns);
}
Console.WriteLine(string.Join(Environment.NewLine, ans));