import java.util.*;
    public class Main{
	public static void main(String[] args){
	    Scanner scan = new Scanner(System.in);
	    String numM = scan.next();
	    char targetP = '+';
	    char targetM = '-';
	    int startNum = 0;
	    int counterP = 0;
	    int counterM = 0;
		
	    for(char Ans: numM.toCharArray()){
		if(Ans==targetP){
		    counterP++;
			}else if (Ans == targetM){
		    counterM++;
		}
	    }
	    System.out.println((startNum+counterP-counterM));
	}
    }

/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