1822B - Karina and Array.cpp

//                                 ॐ नमः शिवाय
#include<bits/stdc++.h>
using namespace std;
#define ll long long
 
// Code Written By: Vikash Patel
// Codeforces Profile: https://codeforces.com/profile/vikashpatel
 
int main()
{
    int t;
    cin>>t;
    while(t--)
    {
        ll n;
        cin>>n;
        ll a[n];
        for(int i=0; i<n; i++)
        {
            cin>>a[i];
        }
        sort(a,a+n, greater<int>());
        cout<<max(a[0]*a[1], a[n-1]*a[n-2])<<endl;
    }
    return 0;
}