#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
#define ll long long
#define rep(i,a,b) for(int i=(a);i<(b);i++)
#define repl(i,a,b) for(ll i=(a);i<(b);i++)
#define all(a) (a).begin(),(a).end()

template <typename T> bool chmin(T &a,T b){if(a>b){a=b;return true;} return false;}
template <typename T> bool chmax(T &a,T b){if(a<b){a=b;return true;} return false;}


int main(){
  ios::sync_with_stdio(false);
  cin.tie(nullptr);

  int T; cin >> T;
  while(T--){
    int n; cin >> n;
    vector<pair<ll,int>> a(n);
    vector<ll> b(n);
    rep(i,0,n) cin >> a[i].first, a[i].second=i;
    rep(i,0,n) cin >> b[i];
    sort(all(a));
    vector<ll> sum1(n+1),sum2(n+1);
    rep(i,0,n) sum1[i+1]=a[i].first,sum2[i+1]=b[i];
    rep(i,0,n) sum1[i+1]+=sum1[i],sum2[i+1]+=sum2[i];
    ll sum=sum1[n],cnt=0;
    rep(i,1,n+1){
      if(chmax(sum,sum1[n]-sum1[i]+sum2[i])) cnt=i;
    }
    vector<int> bi(n);
    rep(i,0,cnt) bi[a[i].second]=1;
    for(auto bb:bi) cout << bb;
    cout << '\n';
  }
}