T = int(input())
for _ in range(T):
    N = int(input())
    F = input()

    ans = 0
    plus_minus = "+"
    for i in range(N):
        if(plus_minus == "+"):
            if(F[i].isnumeric()):
                ans += 9-int(F[i])
            else:
                if(F[i] == "+"):
                    ans += 9
                    plus_minus = "+"
                elif(F[i] == "-"):
                    ans += 9
                    plus_minus = "-"
                elif(F[i] == "*"):
                    ans += 9
        else:
            if(F[i].isnumeric()):
                ans += int(F[i]) - 1
            else:
                if(F[i] == "+"):
                    plus_minus = "+"
                elif(F[i] == "-"):
                    plus_minus = "-"
                elif(F[i] == "*"):
                    pass
    
    print(ans)