#include<bits/stdc++.h>
#include<atcoder/all>
using namespace std;
using namespace atcoder;

typedef modint998244353 mint;
typedef long long ll;

ll val(ll x1, ll y1, ll x2, ll y2, ll x, ll y){
	return (x2 - x1) * (y - y1) - (y2 - y1) * (x - x1);
}

int main(){
	int n; cin >> n;
	vector<ll> x(n), y(n);
	for (int i=0; i<n; i++){
		cin >> x[i] >> y[i];
	}
	ll ans = 0;
	for (int i=0; i<n; i++){
		for (int j=i+1; j<n; j++){
			vector<ll> ar;
			for (int k=0; k<n; k++){
				ll f = val(x[i], y[i], x[j], y[j], x[k], y[k]);
				if (val != 0) ar.push_back(f);
			}
			sort(ar.begin(), ar.end());
			if (ar[(int)ar.size()-1] > 0 && ar[0] < 0){
				ans = max(ans, ar[(int)ar.size()-1] - ar[0]);
			}
		}
	}
	cout << ans << endl;
}