#include <bits/stdc++.h>
using namespace std;
vector<int> ord2;
int f(int l, int r){
	int ans = 0;
	if(l + 1 >= r) return ans;
	int mid = (l + r) / 2;
	ans += f(l, mid) + f(mid, r);
	int i = l, j = mid;
	while(i < mid && j < r){
		if(ord2[i] < ord2[j]){
			i++;
		}else{
			ans += mid - i;
			j++;
 
		}
	}
	inplace_merge(ord2.begin()+l, ord2.begin()+mid, ord2.begin()+r);
	return ans; 
 
}
void solve(){
	int n;
	cin >> n;
	vector<pair<int, int>> vec;
	for(int i = 0; i < n; i++){
		int a, b;
		cin >> a >> b;
		vec.push_back({b, a});
	}
	sort(vec.begin(), vec.end(), greater<pair<int, int>>());
	vector<pair<int, int>> ord;
	for(int i = 0; i < n; i++){
		ord.push_back({vec[i].second, i + 1});
 
	}
	sort(ord.begin(), ord.end(), greater<pair<int, int>>());
	ord2.clear();
	for(int i = 0; i < n; i++){
		ord2.push_back(ord[i].second);
	}
 
	cout << f(0, n) << endl;
}
int main() {
	int t;
	cin >> t;
	while(t--){
		solve();
	}
}

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5
2
2 3
1 4
6
2 6
3 9
4 5
1 8
7 10
-2 100
4
-10 10
-5 5
-12 12
-13 13
5
-4 9
-2 5
3 4
6 7
8 10
4
1 2
3 4
5 6
7 8