import java.util.*;

public class OnetoTen {

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		int total = 55;
		ArrayList<Integer> list = new ArrayList<>();
		int i = 0;
		while(i < 9){
			list.add(s.nextInt());
			i++;
		}
		
		s.close();
		for(int k : list){
			total = total - k;
		}
		System.out.println(total);
	}

}