output_description: Print the integer in Takahashi's mind after he eats all the symbols.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      S
attempt: s=row_input()
  
  print(s.count(+)-s.count(-))
  
  
problem_description: Statement
  
  There is always an integer in Takahashi's mind.
  
  Initially, the integer in Takahashi's mind is 0. Takahashi is now going to eat
  four symbols, each of which is `+` or `-`. When he eats `+`, the integer in
  his mind increases by 1; when he eats `-`, the integer in his mind decreases
  by 1.
  
  The symbols Takahashi is going to eat are given to you as a string S. The i-th
  character in S is the i-th symbol for him to eat.
  
  Find the integer in Takahashi's mind after he eats all the symbols.
samples: [{"input": "+-++", "output": "2\n    \n\n  * Initially, the integer in Takahashi's mind is 0.\n  * The first integer for him to eat is `+`. After eating it, the integer in his mind becomes 1.\n  * The second integer to eat is `-`. After eating it, the integer in his mind becomes 0.\n  * The third integer to eat is `+`. After eating it, the integer in his mind becomes 1.\n  * The fourth integer to eat is `+`. After eating it, the integer in his mind becomes 2.\n\nThus, the integer in Takahashi's mind after he eats all the symbols is 2.\n\n* * *"}, {"input": "-+--", "output": "-2\n    \n\n* * *"}, {"input": "----", "output": "-4"}]