#include <cstdio>
#include <cmath>
#include <iostream>
#include <sstream>
#include <string>
#include <vector>
#include <map>
#include <queue>
#include <algorithm>

#ifdef _DEBUG
#define DMP(x) cerr << #x << ": " << x << "\n"
#else
#define DMP(x) ((void)0)
#endif

const int MOD = 1000000007, INF = 1111111111; 
using namespace std;
typedef long long lint;

int main() {

	cin.tie(nullptr);
	ios::sync_with_stdio(false);

	string S;
	cin >> S;
    
    ans = 0;
    for(int i=0;i<4;i++){
      if(S[i]=='+') ans++;
      else ans--;
    }

	cout << ans << "\n";

	return 0;
}
