import java.util.*;

public class Main {

  public static void main(String[] args) {

    Scanner sc = new Scanner(System.in);
    String str = sc.next();
    char[] c = str.toCharArray();
    int n = 0;

    for (int i = 0 ; i < 4 ; i++ ) {
      if (c[i] == '+') {
        n = n + 1;
      } else {
        n = n - 1;
      }
    }
    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