#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for(int i=0;i<(n);i++)
#define Inf 1000000001

int main(){
	int n;
	cin>>n;
	multiset<long long> a;
	rep(i,n){
		long long t;
		cin>>t;
		a.insert(t);
	}
	
	rep(i,n-1){
		if(i%2==0){
			auto it = a.begin();
			long long x = *it;
			a.erase(it);
			it = a.begin();
			long long y = *it;
			a.erase(it);
			a.insert(x*y);
		}
		else{
			auto it=  a.end();
			it--;
			a.erase(it);
			it = a.end();
			it--;
			a.erase(it);
			a.insert(1LL);
		}
	}
	cout<<(*a.begin())<<endl;
			/*
	if(n==1)cout<<a[0]<<endl;
	else if(n==2)cout<<a[0]*a[1]<<endl;
	else cout<<1<<endl;
	*/
	
	return 0;
}