#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;
 
int main(){
 
	ios_base::sync_with_stdio(false);
 
	int n;
 
	cin >> n;
 
	int w[n];
	int h[n];
 
	for(int i=0; i<n; i++)
		cin>>w[i];
	for(int i=0; i<n; i++)
		cin >>h[i];
 
	int suma;
	vector<int>wynik;
 
	for(int i=0; i<n-2; i++)
		for(int j=i+1; j<n-1; j++)
			for(int k=j+1; k<n; k++)
				if(w[i]<w[j] && w[j]<w[k])
				{
					suma=w[i]+w[j]+w[k];
					wynik.push_back(suma);
				}
 
	sort(wynik.begin(),wynik.end());
 
	if(wynik.size())
		cout << wynik[wynik.size()-1]<<"\n";
	else
		cout<<wynik.size()<<"\n";		
 
}

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OAoyMjUgMjAwIDE1MCAzMDAgMjc1IDE3NSAyNTAgMjYwCjE0MCAxNTAgMTcwIDEwMCAxMTAgMTYwIDEzMCAxMjAKCjUKMTAwIDE1MCAxMDAgMTUwIDE1MCAgIGRydWdpIHRlc3QKMTIwIDExMCAxMDAgOTUgOTQ=

8
225 200 150 300 275 175 250 260
140 150 170 100 110 160 130 120

5
100 150 100 150 150   drugi test
120 110 100 95 94