#include<bits/stdc++.h>
#define rep(i,n) for (int i = 0; i < n; ++i)
#define rep2(i,s,n) for (int i = s; i < n; ++i)
using namespace std;

int main() {
    int s;
    cin >> s;
    int ans = 0;
    rep(i,4) {
        if(s[i] == '+') ans++;
        else ans--;
    }
    cout << ans << endl;
}