T=int(input())
for _ in range(T):
    N=int(input())
    S=input()
    ans = 0
    positive = True
    for i in range(len(S)):
        if S[i].isnumeric():
            if positive:
                ans += 9-int(S[i])
            else:
                ans += int(S[i])-1
        else:
            if positive:
                ans += 9
            if S[i] == "-":
                positive = False
            elif S[i] == "+":
                positive = True
    print(ans)