import java.util.*;
import java.lang.*;
import java.io.*;

class Main
{
	public static void main (String[] args) 
	{
		// 入力値の読み込み
		Scanner sc = new Scanner(System.in);
		int  f = sc.nextInt();
		
		int nt=55;
		int[] a =new int[9];
		for(int m=0;m == 9;m++){
		a[m] = sc.nextInt();
		nt -= a[m];
		}
		System.out.println(nt);
	}
}