import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.ArrayDeque;
import java.util.Arrays;
import java.util.PriorityQueue;
import java.util.Queue;

public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int t = Integer.parseInt(br.readLine());
		PrintWriter pw = new PrintWriter(System.out);
		for (int z = 0; z < t; z++) {
			int n = Integer.parseInt(br.readLine());
			String[] sa = br.readLine().split(" ");
			int[] a = new int[n];
			for (int i = 0; i < n; i++) {
				a[i] = Integer.parseInt(sa[i]);
			}
			sa = br.readLine().split(" ");
			int[] b = new int[n];
			for (int i = 0; i < n; i++) {
				b[i] = Integer.parseInt(sa[i]);
			}

			PriorityQueue<Obj> que = new PriorityQueue<>((o1, o2) -> o1.a - o2.a);
			long val = 0;
			for (int i = 0; i < n; i++) {
				Obj o = new Obj();
				o.i = i;
				o.a = a[i];
				que.add(o);
				val += a[i];
			}

			Queue<Obj> que2 = new ArrayDeque<>();
			long max = val;
			char[] ans = new char[n];
			Arrays.fill(ans, '0');
			for (int i = 0; i < n; i++) {
				Obj o = que.poll();
				val -= o.a;
				val += b[i];
				que2.add(o);
				if (val > max) {
					max = val;
					while (!que2.isEmpty()) {
						Obj o2 = que2.poll();
						ans[o2.i] = '1';
					}
				}
			}
			pw.println(ans);
		}
		pw.flush();
		br.close();
	}

	static class Obj {
		int i, a;
	}
}