#include <atcoder/all>
#include <bits/stdc++.h>
using namespace std;

using i32 = int;
using i64 = long long;
using i128 = __int128_t;
using f64 = double;
using p2 = pair<i64, i64>;
using el = tuple<i64, i64, i64>;
using mint = atcoder::modint;

void _main();
int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  cout << fixed << setprecision(18);
  _main();
}

void _main() {
  i64 tt;
  cin >> tt;
  for (;tt--;) {
    i64 n;
    cin >> n;
    vector<p2> a(n);
    vector<i64> b(n);
    i64 sum = 0;
    for (i64 i = 0; i < n; i++) {
      cin >> a[i].first;
      sum += a[i].first;
      a[i].second = i;
    }
    for (i64 i = 0; i < n; i++) {
      cin >> b[i];
    }
    sort(a.begin(), a.end());
    i64 ans = sum;
    i64 amx = 0;
    for (i64 i = 1; i <= n; i++) {
      sum -= a[i - 1].first, sum += b[i - 1];
      if (ans < sum) {
        ans = sum;
        amx = i;
      }
    }
    vector<i64> v(n, 0);
    for (i64 i = 0; i < amx; i++) {
      v[a[i].second] = 1;
    }
    for (i64 x : v) cout << x;
    cout << "\n";
  }
}