import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ

		Scanner scanner = new Scanner(System.in);

		String S = scanner.next();

		int seikai = 0;


		for (int i = 0; i <=3; i++) {

		if(S.substring(i,i+1).equals("+")) {    //文字列の中身だけ比較する

			seikai++;
		}

			else {

			seikai--;
		}


}

		System.out.println(seikai);
}

}
/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