#include <iostream>
#include <fstream>
#include <bits/stdc++.h>
#include <map>
#define pb push_back
#define ll long long
using namespace std;
const int siz = 510;
int n;
ll d[siz],m[siz][siz]; 
int main()
{
    ifstream fin("z.in");
    ofstream fout("z.out");
    fin>>n;
    for(int i = 0 ; i <= n ;i++){
        fin>>d[i];
    }
    for(int i=1;i<=n;i++)
    {
        m[i][i]=0;
    }
    for(int i=1;i<=n-1;i++)
    {
        m[i][i+1]=d[i-1]*d[i]*d[i+1];
    }

    fin.close();
    fout.close();
    return 0;
}