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

int main() {
    int n;
    cin >> n;
    vector<int> a(2 * n), b(2 * n);
    for (int i = 0; i < 2 * n; i++)
        cin >> a[i];
    for (int i = 0; i < 2 * n; i++)
        cin >> b[i];
    vector<int> c(2 * n);
    for (int i = 0; i < 2 * n; i++)
        c[i] = a[i] + b[i];
    sort(c.begin(), c.end());
    
    long long sum = 0;
    for (int i = 0; i < 2 * n; i += 2)
        sum += c[i];
    cout << sum - accumulate(b.begin(), b.end(), 0LL) << '\n';
}