import java.util.*;
public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    String s = sc.next();
    String g[] = new String[4];
    int answer = 0;
    g[0] = s.substring(0,1);
    g[1] = s.substring(1,2);
    g[2] = s.substring(2,3);
    g[3] = s.substring(3,4);
    for(int i =0;i<4;i++){
      if(g[i].equals("+")){
        answer = answer +1;
      }else{
        answer = answer -1;
      }
    }
    System.out.println(answer);
  }
  

  
}
/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