import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class No552{
	public static void main(String[] args) throws IOException{
		getAnswer();
	}
	public static void getAnswer() throws IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String str = br.readLine();
		if(str.length() >= 2){
			System.out.println(str + "0");
		}
		else{
			System.out.println(Integer.parseInt(str) * 10);
		}
	}
}