import java.util.List;
import java.util.Scanner;

public class Main {
	static int v = 0;
	static List<List<Integer>> ansList = null;

	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		sc.close();

		System.out.println(n * 10);
	}
}