for _ in range(int(input())):
  n=int(input())
  f=input()
  p=1
  ans=0
  for c in f:
    if c in'-+*':
      if p:
        ans+=9
    else:
      c=int(c)
      if p:
        ans+=9-c
      else:
        ans+=c-1
    if c=='-':
      p=0
    elif c=='+':
      p=1
  print(ans)