1399B - Gifts Fixing

using namespace std;
using ll = long long;
using vi = vector<int>;
ll solve(int n, const vi &a, const vi &b)
{
    ll ans = 0;
    int a0 = *min_element(a.begin(), a.end());
    int b0 = *min_element(b.begin(), b.end());
    for (int i = 0; i < n; ++i)
    {
        ans += max(a[i] - a0, b[i] - b0);
    }
    return ans;
}
int main(void)
{
    int t, n;
    vi a, b;
    cin >> t;
    while (t--)
    {
        cin >> n;
        a.resize(n), b.resize(n);
        for (auto &ai : a)
            cin >> ai;
        for (auto &bi : b)
            cin >> bi;
        cout << solve(n, a, b) << endl;
    }
    return 0;
}