#include <iostream>
#include <algorithm>
using namespace std;

int a[114514], b[114514], n;

int main() {
    cin >> n;
    for (int i = 1; i <= n; i++) {
        cin >> a[i];
    }
    for (int i = 1; i <= n; i++) {
        cin >> b[i];
    }
    sort(a + 1, a + n + 1);
    sort(b + 1, b + n + 1);
    int ans = 0;
    for (int i = 1; i <= n; i++) {
        ans += a[i] * b[i];
    }
    cout << ans << endl;
    return 0;
}

RE