func_code_string: #include <bits/stdc++.h>   using namespace std;   using ll = long long;   using pii = pair<int, int>;   template <typename... T>   void rd(T&... args) {     ((cin >> args), ...);   }   template <typename... T>   void wr(T... args) {     ((cout << args <<    ), ...);     cout << endl;   }   int main() {     ios::sync_with_stdio(false);     cin.tie(nullptr);     int tt;     cin >> tt;     while (tt--) {       int n;       cin >> n;       vector<int> a(n), l(n);       for (auto& i : a) cin >> i;       for (auto& i : l) cin >> i;       vector<int> tmp;       for (int i = 0; i < n; i++) {         if (!l[i]) {           tmp.push_back(a[i]);         }       }       sort(tmp.begin(), tmp.end());       for (int i = 0; i < n; i++) {         if (l[i])           cout << a[i] <<    ;         else {           cout << tmp.back() <<    ;           tmp.pop_back();         }       }       cout <<   n ;     }     return 0;   }   