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

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

    int T; cin >> T;
    while(T--){
        int N; cin >> N;
        vector<long long> A(N),B(N);
        for(auto &a : A) cin >> a;
        for(auto &b : B) cin >> b;
        
        vector<pair<long long,int>> A2(N);
        for(int i=0; i<N; i++) A2.at(i) = {A.at(i),i};
        sort(A2.begin(),A2.end());

        string answer(N,'0');
        int eat = 0;
        long long best = -1e18,sum = 0;
        for(auto a : A) sum += a;
        best = sum;
        for(int i=0; i<N; i++){
            sum -= A2.at(i).first;
            sum += B.at(i);
            if(sum > best) best = sum,eat = i+1;
        }
        for(int i=0; i<eat; i++) answer.at(A2.at(i).second) = '1';

        cout << answer << "\n";
    }

}