import java.util.Scanner;
import java.util.Arrays;
class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int a = 0;
    char[] symbols = sc.next().toCharArray();
    for(int i = 0; i < 4; i++){
    if(symbols[i] == '+'){
      a++;
    }else{
      a--;
    }
  }
  System.out.println(a);
    
  }
}
/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