#include <iostream>
#include <algorithm>

using namespace std;

int main() {
    int n;
    cin >> n;
    int arr[n];
    int arr2[n];
    for (int i = 0;i < n;i++) {
        cin >> arr[i];
    }
    for (int i = 0;i < n;i++) {
        cin >> arr2[i];
    }
    
    sort(arr,arr+n);
    sort(arr2,arr2+n,greater<int>());

  //   for (int i = 0;i < n;i++) {
  //      cout << arr[i] << arr2[i];
 //   }
    
    int sum = 0;
    for (int i = 0;i < n;i++) {
        sum += arr[i] * arr2[i];
    }
    cout << sum;
    return 0;
}