import java.util.Scanner;
public class Main {
  public static void main(String[] args) {
    Scanner scanner = new Scanner(System.in);

    String S = scanner.nextLine();
    int N = 0;
    for ( int i = 0; i < S.length(); i++ ) {
      if ( S.charAt(i) == '+') {
        N++;
      } else {
        N--;
      }
    }
    System.out.println(N);
  }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz