import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        
        Scanner scanner = new Scanner(System.in);
        
        //1から10までの和は55
        int sum = 0;
        
        for(int i=0;i<9;i++){
            sum += scanner.nextInt();
        }
        
        System.out.println(55 - sum);
    }
    
}