import java.util.*;

public class Main {
  
  public static void main(String[] args) {
    
    Scanner scan = new Scanner(System.in);
    int x = 0;
    String str = scan.next();
    
    for (int i = 0; i <= 3; i++) {
      char ch = str.charAt(i);
      
      if (ch == '+') {
        x = x + 1;
      }
      
      if (ch == '-') {
        x = x - 1;
      }
    }
    
    System.out.println(x);
  }
}

/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