import java.io.*;
import java.util.*;

class Main {
  public static void main(String[] args)throws IOException{
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      char[] a=br.readLine().toCharArray();
      long count=0;
      for(int i=0;i<a.length;i++){
        if(a[i]=='+')
         count++;
        else
        count--;
      }
      System.out.println(count);
    }
  }

/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