#include <bits/stdc++.h>
using namespace std;
struct Point {
  double x, y;
} p[301];
inline double Area(Point &a, Point &b, Point &c) {
  return ((a.x - c.x) * (b.y - c.y) - (a.y - c.y) * (b.x - c.x)) / 2;
}
inline void check(double &a, double b) {
  if (b - a > 1e-10) a = b;
}
int main() {
  int n;
  cin >> n;
  for (int i = 0; i < n; ++i) cin >> p[i].x >> p[i].y;
  double res = 0;
  for (int i = 0; i < n; ++i)
    for (int j = i + 1; j < n; ++j) {
      double Max1 = -1, Max2 = -1;
      for (int k = 0; k < n; ++k) {
        {
          if (k == i || k == j) continue;
        }
        if (Area(p[i], p[j], p[k]) < 0)
          check(Max1, -Area(p[i], p[j], p[k]));
        else
          check(Max2, Area(p[i], p[j], p[k]));
      }
      if (Max1 >= 0 && Max2 >= 0) check(res, Max1 + Max2);
    }
  cout << setiosflags(ios::fixed) << setprecision(6) << res << endl;
  return 0;
}
