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

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int N; cin >> N;
    N *= 2;
    vector<int> A(N),B(N);
    for(auto &a : A) cin >> a;
    for(auto &b : B) cin >> b;

    vector<int> P(N);
    for(int i=0; i<N; i++) P.at(i) = i;
    sort(P.begin(),P.end(),[&](auto &a,auto &b){
        return max(A.at(a),B.at(a))<max(A.at(b),B.at(b));   
    });

    long long answer = 0;
    for(int i=0; i<N;){
        int p = P.at(i); i++;
        answer += A.at(p);
        p = P.at(i); i++;
        answer -= B.at(p);
    }
    cout << answer << endl;
}