import java.util.Scanner;

public class Main {

		public static void main(String[] args) {
			Scanner sc = new Scanner(System.in);

			String str = sc.next();

			String[] strArray = str.split("");
			int num = 0;

			for(int i =0;i < strArray.length;i++) {

				if(strArray[i].equals("+")) {
					num++;
				}else {
					num--;
				}
			}

			System.out.println(num);



	}


}


