import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		// 整数の入力
	 String a = sc.nextLine();
     int count = 0;
      
		// スペース区切りの整数の入力
		for(int i = 0; i < 4; i++){
            String tmp = a.substring(i,i+1);
            if(tmp.equals("+")){
                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