filein = open("DATA2.txt","r")
out = open("OUT2.txt","w+")

balance = 0
flag = False
for line in filein:
        for char in line:
            if char == '+': balance +=1
            elif char == '-' : balance -=1
            if balance < 0 : flag = True
        if flag :
            out.write("OH NOES!\n")
            flag = False
            balance = 0
        else :
            out.write("%i\n" % balance)
out.close()
out.close()