import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.stream.Stream;

public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		int sum = Stream.of(br.readLine().split(" ")).mapToInt(Integer::parseInt).sum();

		System.out.println(55 - sum);

	}

}