#include <bits/stdc++.h>
#define rep(i,n) for (int i=0;i<(n);i++)
using namespace std;
using ll = long long;
using P = pair<int,int>;
 
 
int main() {
    string s;
    cin >> s;
    ans=0;
    rep(i,4){
        if(s.at(i)=='+')ans++;
        else ans--;
    }
    cout << ans << endl;
}