## https://yukicoder.me/problems/no/3308

def solve(N, F):

    array = []
    for f in F:
        if len(array) == 0:
            array.append((1, [f]))
        else:
            if f  == "+":
                array.append((1, []))
            elif f == "-":
                array.append((-1, []))
            else:
                array[-1][1].append(f)
    
    answer = 0
    for sign, ar in array:
        for a in ar:
            if a == "*":
                if sign == 1:
                    answer += 9
            else:
                if sign == 1:
                    answer += 9 - int(a)
                else:
                    answer += int(a) - 1
    
    for i in range(1, len(array)):
        if array[i - 1][0] == 1:
            answer += 9
    return answer            








def main():
    T = int(input())

    answers = []
    for _ in range(T):
        N = int(input())
        F = input()
        ans = solve(N, F)
        answers.append(ans)

    for ans in answers:
        print(ans)



if __name__ == "__main__":
    main()