import java.util.*;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();
        int ans = (s.length() - s.replace("+", "").length()) -
                (s.length() - s.replace("-", "").length());

        System.out.println(ans);
    }
} import java.util.*; util.* java public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();
        int ans = (s.length() - s.replace("+", "").length()) -
                (s.length() - s.replace("-", "").length());

        System.out.println(ans);
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();
        int ans = (s.length() - s.replace("+", "").length()) -
                (s.length() - s.replace("-", "").length());

        System.out.println(ans);
    } main {
        Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();
        int ans = (s.length() - s.replace("+", "").length()) -
                (s.length() - s.replace("-", "").length());

        System.out.println(ans);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String s = sc.nextLine(); s sc.nextLine() sc.nextLine sc int ans = (s.length() - s.replace("+", "").length()) -
                (s.length() - s.replace("-", "").length()); ans (s.length() - s.replace("+", "").length()) -
                (s.length() - s.replace("-", "").length()) (s.length() - s.replace("+", "").length()) s.length() s.length s s.replace("+", "").length() s.replace("+", "").length s.replace("+", "") s.replace s "+" "" (s.length() - s.replace("-", "").length()) s.length() s.length s s.replace("-", "").length() s.replace("-", "").length s.replace("-", "") s.replace s "-" "" System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();
        int ans = (s.length() - s.replace("+", "").length()) -
                (s.length() - s.replace("-", "").length());

        System.out.println(ans);
    }
} public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();
        int ans = (s.length() - s.replace("+", "").length()) -
                (s.length() - s.replace("-", "").length());

        System.out.println(ans);
    }
} Main
import java.util.*;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();
        int ans = (s.length() - s.replace("+", "").length()) -
                (s.length() - s.replace("-", "").length());

        System.out.println(ans);
    }
}
