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

typedef long long ll;
typedef long double ld;
#define int ll
#define double ld
#define _FastIO ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define pii pair<int , int>
#define pb emplace_back
#define endl '\n'
#define sz(x) (int)((x).size())
#define all(x) (x).begin() , (x).end()
#define rall(x) (x).rbegin() , (x).rend()
#define F first
#define S second
const int mod = 998244353;
const int MAXX = 2e5 + 5;
const int N = 1e6;
const int INF = INT_MAX;

int t , n;
int a[MAXX];
int b[MAXX];

signed main()
{
    _FastIO;
    cin >> t;
    while(t--){
        cin >> n;
        for(int i = 0; i < n; i++){
            cin >> b[i];
        }
        for(int i = 0; i < n; i++){
            cin >> a[i];
        }
        sort(a , a + n);
        sort(b , b + n);
        int l = 0 , r = 0;
        int ind = n;
        int ans = 0;
        while((l < n) && (r < n)){
            if(a[l] >= b[r]){
                l++;
                r++;
                ans += ind;
                ind--;
            }else{
                l++;
            }
        }
        cout << ans << endl;
    }
    return 0;
}