import java.util.ArrayDeque;
import java.util.Scanner;
import java.util.stream.Collectors;

public class Main {
	public static void main(String[] args) {
		try (Scanner sc = new Scanner(System.in)) {
			int N = sc.nextInt();
			ArrayDeque<String> deque = new ArrayDeque<>();
			while(N --> 0) {
				if (sc.nextInt() == 0) deque.addLast(sc.next());
				else deque.addFirst(sc.next());
			}
			System.out.println(deque.stream().collect(Collectors.joining()));
		}
	}
}