import java.util.Scanner;

public class Main {

  public static void main(String[] args) {

    Scanner sc = new Scanner(System.in);
    String s = sc.next();
    int ans = 0;

    for (int i = 0; i < s.length(); i++) {
      if (s.charAt(i) == '+') {
        ans++;
      } else {
        ans--;
      }
    }

    System.out.println(ans);

  }
}