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

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	int n;
	cin >> n;
	vector<int> a(n);
	for(int& x : a) cin >> x;
	auto m1 = min_element(a.begin(), a.end());
	swap(*m1, a.back());
	auto m2 = min_element(a.begin(), a.end() - 1);
	cout << a.back() + *m2 << endl;
}