#include<bits/stdc++.h>
using namespace std;
#define int long long
int n,ans;
struct st{
	int b,c;
}s[200010];
bool cmp(st s1,st s2){
	return s1.b+s2.c>s1.c+s2.b;
}
signed main(){
	cin>>n;
	for(int i=1;i<=2*n;i++){
		cin>>s[i].b;
	}
	for(int i=1;i<=2*n;i++){
		cin>>s[i].c;
	}
	sort(s+1,s+1+2*n,cmp);
	for(int i=1;i<=n;i++){
		ans+=s[i].b;
	}
	for(int i=n+1;i<=2*n;i++){
		ans+=s[i].c;
	}
	cout<<ans;
    return 0;
}