#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < (n); ++i)
using namespace std;
using ll = long long;
using ld = long double;
using P = pair<int, int>;

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