#include <bits/stdc++.h>
using namespace std;
 
int main() {
  string S;
  cin >> S;
  
  int ans = 0;
  for(int i = 0; i < 4; i++){
  	if(S.at(i) == "+"){
    	ans++;
    }else if(S.at(i) == "-"){
    	ans--;
    }
  }
  
  cout << ans << endl;
}
