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#include <iostream>
#include <vector>
#include <climits>
#include <cmath>

using namespace std;

int main() {
int N;
cin >> N;
vector<pair<int, int>> points(N);
for (int i = 0; i < N; ++i) {
cin >> points[i].first >> points[i].second;
}

int max_area = 0;

for (int i = 0; i < N; ++i) {
    for (int j = 0; j < N; ++j) {
        if (i == j) continue;
        if (points[i].second == points[j].second) { // AB parallel to x-axis (y_i = y_j)
            for (int k = 0; k < N; ++k) {
                if (k == i || k == j) continue;
                if (points[i].first == points[k].first) { // AC parallel to y-axis (x_i = x_k)
                    int area = abs((points[j].first - points[i].first) * (points[k].second - points[i].second));
                    if (area > max_area) {
                        max_area = area;
                    }
                }
            }
        }
    }
}

cout << max_area << endl;
return 0;

}