#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ull = unsigned long long;

#define REP(i,n) for(long long i = 0; i < (n); i++)
#define FOR(i, m, n) for(long long i = (m);i < (n); ++i)
#define ALL(obj) (obj).begin(),(obj).end()
#define SPEED cin.tie(0);ios::sync_with_stdio(false);

template<class T> using V = vector<T>;
template<class T, class U> using P = pair<T, U>;
template<class T> using PQ = priority_queue<T>;
template<class T> using PQR = priority_queue<T,vector<T>,greater<T>>;

constexpr long long MOD = (long long)1e9 + 7;
constexpr long long MOD2 = 998244353;
constexpr long long HIGHINF = (long long)1e18;
constexpr long long LOWINF = (long long)1e15;
constexpr long double PI = 3.1415926535897932384626433;

template <class T> vector<T> multivector(size_t N,T init){return vector<T>(N,init);}
template <class... T> auto multivector(size_t N,T... t){return vector<decltype(multivector(t...))>(N,multivector(t...));}
template <class T> void corner(bool flg, T hoge) {if (flg) {cout << hoge << endl; exit(0);}}
template <class T, class U>ostream &operator<<(ostream &o, const map<T, U>&obj) {o << "{"; for (auto &x : obj) o << " {" << x.first << " : " << x.second << "}" << ","; o << " }"; return o;}
template <class T>ostream &operator<<(ostream &o, const set<T>&obj) {o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr) o << (itr != obj.begin() ? ", " : "") << *itr; o << "}"; return o;}
template <class T>ostream &operator<<(ostream &o, const multiset<T>&obj) {o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr) o << (itr != obj.begin() ? ", " : "") << *itr; o << "}"; return o;}
template <class T>ostream &operator<<(ostream &o, const vector<T>&obj) {o << "{"; for (int i = 0; i < (int)obj.size(); ++i)o << (i > 0 ? ", " : "") << obj[i]; o << "}"; return o;}
template <class T, class U>ostream &operator<<(ostream &o, const pair<T, U>&obj) {o << "{" << obj.first << ", " << obj.second << "}"; return o;}
template <template <class tmp>  class T, class U> ostream &operator<<(ostream &o, const T<U> &obj) {o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr)o << (itr != obj.begin() ? ", " : "") << *itr; o << "}"; return o;}
void print(void) {cout << endl;}
template <class Head> void print(Head&& head) {cout << head;print();}
template <class Head, class... Tail> void print(Head&& head, Tail&&... tail) {cout << head << " ";print(forward<Tail>(tail)...);}
template <class T> void chmax(T& a, const T b){a=max(a,b);}
template <class T> void chmin(T& a, const T b){a=min(a,b);}
void YN(bool flg) {cout << (flg ? "YES" : "NO") << endl;}
void Yn(bool flg) {cout << (flg ? "Yes" : "No") << endl;}
void yn(bool flg) {cout << (flg ? "yes" : "no") << endl;}


//Union Find Tree
class UnionFindTree {
public:
	vector<int> parent;
    vector<int> rank;

    UnionFindTree(int N) : parent(N), rank(N,0){
		for (int i = 0; i < N; ++i) parent[i] = i;
	}
 
	int root(int n) {
		return (parent[n] == n ? n : parent[n] = root(parent[n]));
	}

    int same(int n, int m) {
		return root(n) == root(m);
	}
 
	void unite(int n, int m) {
		n = root(n);
		m = root(m);
		if (n == m) return;
		if(rank[n]<rank[m]) {
            parent[n] = m;
        }
        else{
            parent[m] = n;
            if(rank[n] == rank[m]) rank[n]++;
        }
	}
};

int main() {
    SPEED
    int t; cin >> t;
    vector<ll> ans;
    while(t--){
        int N; cin >> N;
        vector<ll> m(N);
        vector<int> p(N);
        for(int i = 0; i < N; ++i) cin >> m[i] >> p[i];
        vector<vector<int>> cls(N);
        for(int i = 0; i < N; ++i) cls[m[i]].push_back(i);
        vector<int> sum(N);
        for(int i = 0; i < N; ++i) sum[i] = cls[i].size();
        for(int i = 1; i < N; ++i) sum[i] += sum[i-1];
        UnionFindTree uf(N);
        for(int i = 1; i < N; ++i) if(sum[i-1]>=i) uf.unite(i-1,i);
        vector<priority_queue<P<ll,int>>> grp(N);
        for(int i = 0; i < N; ++i) grp[uf.root(m[i])].push({-p[i],i});
        set<int> st;
        int idx = 0;
        ll cnt = 0;
        int bck = N-1;
        while(st.size()<N){
            int m = st.size();
            for(; idx <= m && idx < N; ++idx) {
                while(grp[idx].size()){
                    st.insert(grp[idx].top().second);
                    grp[idx].pop();
                }
            }
            if(idx<=st.size()) continue;
            if(0<=bck&&grp[bck].size()) {
                cnt += -grp[bck].top().first;
                st.insert(grp[bck].top().second);
                grp[bck].pop();
            }
            while(0<=bck&&grp[bck].empty()) bck--;

        }
        ans.push_back(cnt);
    }
    for(auto& e:ans) cout << e << endl;
    



    return 0;
}
