import java.util.Scanner;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String str = sc.next();
    int ans = 0;
    for(int i = 0; i < str.length(); i++) {
      if (str.charAt(i) == '+') ans++;
      else ans--;
    }
    System.out.println(ans);
  }
}