import sys
import io

# 関数 solve は，もちろん，問題に応じて書き換える
def solve(n):
    QUE=n
    EatSM=0
    Sum=QUE.count("+")
    Minus=QUE.count("-")
    print(EatSM+Sum-Minus)
    return EatSM+Sum-Minus

# ここから下は，入力・出力形式が同じであれば，変えなくて良い．
def readQuestion():
    line = sys.stdin.readline().rstrip()
    return line

def main():
    n = readQuestion()
    answer = solve(n)
    print(answer)
    
if __name__ == '__main__':
    main()