#include <bits/stdc++.h>
using namespace std;
struct TPoint {
  double x, y;
  TPoint(){};
  TPoint(double _x, double _y) {
    x = _x;
    y = _y;
  }
};
struct TVector {
  double x, y;
  TVector() {}
  TVector(TPoint p) {
    x = p.x;
    y = p.y;
  }
  TVector(TPoint p1, TPoint p2) {
    x = p2.x - p1.x;
    y = p2.y - p1.y;
  }
};
double cosv(TVector v1, TVector v2) {
  return (double)(v2.x * v1.y - v1.x * v2.y);
}
int main() {
  int n;
  cin >> n;
  vector<TPoint> in;
  for (int i = 0; i < n; ++i) {
    double x, y;
    cin >> x >> y;
    in.push_back(TPoint(x, y));
  }
  double maxpl = 0;
  for (int i = 0; i < n; ++i) {
    for (int j = i + 1; j < n; ++j) {
      double lefter = -1, righter = -1;
      for (int k = 0; k < n; ++k) {
        if (k != i && k != j) {
          double cosven = cosv(TVector(in[i], in[j]), TVector(in[i], in[k]));
          if (cosven > 0) {
            lefter = max(lefter, cosven / 2);
          } else {
            righter = max(righter, -cosven / 2);
          }
        }
      }
      if (lefter > 0 && righter > 0) maxpl = max(maxpl, lefter + righter);
    }
  }
  cout.precision(10);
  cout << maxpl << endl;
}
