def main():
    for _ in range(int(input())):
        _ = int(input())
        s = list(input())
        f = True
        ans = 0
        for c in s:
            if c=="+":
                if f:
                    ans += 9
                f = True
            elif c=="-":
                if f:
                    ans += 9
                f = False
            elif c=="*":
                if f:
                    ans += 9
            elif f:
                ans += 9-int(c)
            else:
                ans += int(c)-1
        print(ans)


if __name__ == "__main__":
    main()