T = int(input())
for _ in range(T):
    N = int(input())
    F = input()
    m = False
    ans = 0
    for c in F:
        if c == '+':
            if not m:
                ans += 9
            m = False
        if c == '-':
            if not m:
                ans += 9
            m = True
        if c == '*':
            if not m:
                ans += 9
        if c.isnumeric():
            if m:
                ans += int(c) - 1
            else:
                ans += 9 - int(c)
    print(ans)