func_code_string: #include <bits/stdc++.h>   using namespace std;   const int MAX = 2e5 + 10;   int arr[MAX];   int n;   vector<int> v[MAX];   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     int t;     cin >> t;     while (t--) {       cin >> n;       for (int i = 0; i < n; ++i) v[i].clear();       for (int i = 0; i < n; ++i) {         int x, y;         cin >> x >> y;         v[x].push_back(y);       }       long long ans = 0;       priority_queue<int, vector<int>, greater<int> > q;       for (int i = n - 1; i >= 0; --i) {         for (auto &j : v[i]) q.push(j);         while (q.size() > n - i) ans += q.top(), q.pop();       }       cout << ans <<   n ;     }     return 0;   }   