import java.util.Scanner;

class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String str = sc.nextLine();
		int sysoutResult = 0;
		for(int i = 0; i < str.length(); i++){
				if(str.charAt(i) == '+'){
					sysoutResult += 1;
				}
				if(str.charAt(i) == '-'){
					sysoutResult -= 1;
				}
		}
		System.out.println(sysoutResult);
	}
}
/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