#include <bits/stdc++.h>
using namespace std;
int main(){
string S;
  cin>>S;
 int count =0; 

  for(int i=0;i<S.size();i++){
  if(S.at(i)=="+"){
    count+=1;


}
  if(S.at(i)=="-"){
  count-=1;
  }
  }
  cout<<count<<endl;
}
