import java.util.Scanner;

public class Main {

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