import java.math.BigInteger;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.Scanner;
import java.util.Set;

public class Main {
	
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		long sum = 55;
		for(int i = 0; i < 9; i++){
			sum -= sc.nextLong();
		}
		
		System.out.println(sum);
	}
}