180423_1026_보물

	//https://www.acmicpc.net/problem/1026 #include <iostream>
	#include <algorithm>
	#include <vector>
	using namespace std;
	bool cmp(int a, int b){
	return a>b;
	}
	int main(){
	int n;
	cin>> n;
	vector<int> A;
	vector<int> B;
	for(int i=0; i<n; i++) {
	int a;
	cin >> a;
	A.push_back(a);
	}
	for(int i=0; i<n; i++) {
	int b;
	cin >> b;
	B.push_back(b);
	}
	sort(B.begin(), B.end());
	sort(A.begin(), A.end(), cmp);
	int ans=0;
	for(int i=0; i<n; i++){
	ans+=A[i]*B[i];
	}
	cout << ans;
	return 0;
	}