def do(operations):
    result = 0
    length = len(operations)
    list_i = list(range(0,length))
    for i in list_i :
        if(operations[i]=="--"):
            result -= 1
        elif(operations[i]=="++"):
            result += 1
    return result
 
 
experession_list = eval(input())   #if input as a list like this : "++", "++", "--", "++" or ["++", "++", "--", "++"]
"""experession_list = input().split()""" #if input spaced like this : ++ ++ -- ++
 
result = do(experession_list)
print(result)
 
 

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WyZxdW90OysrJnF1b3Q7LCAmcXVvdDsrKyZxdW90OywgJnF1b3Q7LS0mcXVvdDssICZxdW90OysrJnF1b3Q7XQ==

["++", "++", "--", "++"]