R=range
I=input
for t in R(int(I())):
	N,F,a,s=I(),I(),0,1
	for c in F:
		if c>'-':a+=[ord(c)-49,57-ord(c)][s]
		elif c<'+':a+=9*s
		else:s,a=c<'-',a+9
	print(a)