#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
using P = pair<int,int>;

int main(void){
    string s;
  cin >> s;
  int ans = 0;
  for(int i=0; i<4; i++){
  	if(s[i] == "+") ans++;
    else ans--;
  }
  cout << ans << endl;
    return 0;
}