#include <bits/stdc++.h>
using namespace std;
int main(){
    int N;
    cin >> N;
    vector<long long> A(N);
    for(int i = 0; i < N; i++) cin >> A[i];
    if(N == 1){
        cout << A[0] << endl;
    }
    else if(N == 2){
        cout << A[0] * A[1] << endl;
    }
    else{
        if(N % 2 == 1){
            cout << A[N / 2] << endl;
        } 
        else{
            cout << 1 << endl;
        }
    }
}