import sys


def input(): return sys.stdin.readline().rstrip('\n')


def main():
    t = int(input())
    for _ in range(t):
        input()
        f = input()

        plus = True
        ans = 0
        for c in f:
            if c in ['+', '-', '*']:
                if plus:
                    ans += 9
                if c == '+':
                    plus = True
                if c == '-':
                    plus = False
            else:
                if plus:
                    ans += 9 - int(c)
                else:
                    ans += max(0, int(c) - 1)

        print(ans)


if __name__ == '__main__':
    main()