import java.util.Scanner;

public class Solution {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int a = Integer.MAX_VALUE, b = Integer.MAX_VALUE;
        while (n-- > 0) {
            a = Math.min(a, sc.nextInt());
            b = Math.min(b, sc.nextInt());
        }
        
        System.out.println(1L * a * b);
    }
}