#include <iostream>
#include <vector>
#include <set>
#include <cmath>

struct y
{
    bool operator () (const std::pair<long, long> & a, const std::pair<long, long> & b) const {
        if (a.second > b.second)
            return true;
        return a.first < b.first;
    }
};

struct x
{
    bool operator () (const std::pair<long, long> & a, const std::pair<long, long> & b) const {
        if (a.first < b.first)
            return true;
        return a.second < b.second;
    }
};

int main() {
    size_t n;
    std::cin >> n;
    std::set<std::pair<long, long>, x> xFirst;  // vlevo dole
    std::set<std::pair<long, long>, y> yFirst;  // vlevo nahore
    for (size_t i = 0; i < n; ++i)
    {
        long x, y;
        std::cin >> x >> y;
        xFirst.insert({x, y});
        yFirst.insert({x, y});
    }
    while (n != 4) {
        n -= 4;
        std::pair<long, long> a;
        std::pair<long, long> b;
        std::pair<long, long> c;
        std::pair<long, long> d;
        a = *xFirst.begin();
        b = *yFirst.begin();
        c = *(--xFirst.end());
        d = *(--yFirst.end());
        xFirst.erase(a);
        xFirst.erase(b);
        xFirst.erase(c);
        xFirst.erase(d);
        yFirst.erase(a);
        yFirst.erase(b);
        yFirst.erase(c);
        yFirst.erase(d);
    }
    std::pair<long, long> a;
    std::pair<long, long> b;
    std::pair<long, long> c;
    std::pair<long, long> d;
    a = *xFirst.begin();
    b = *yFirst.begin();
    c = *(--xFirst.end());
    d = *(--yFirst.end());

    long dx = abs(a.first - b.first);
    long dy = abs(a.second - b.second);

    double xxxx = std::sqrt(dx * dx + dy * dy);
    dx = abs(c.first - b.first);
    dy = abs(c.second - b.second);
    double yyyy = std::sqrt(dx * dx + dy * dy);


    std::cout << int(xxxx*yyyy) << std::endl;



    return 0;
}