#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

int main() {
    int n;
    cin >> n;

    int x, y;
    cin >> x >> y;
    int minx = x, miny = y;
    for (int i = 1; i < n; ++i) {
        cin >> x >> y;
        minx = min(x, minx);
        miny = min(y, miny);
    }

    cout << minx * miny;

    return 0;
}