#include <bits/stdc++.h>
#define int long long
#define pb push_back
#define pii pair<int, int>
using namespace std;

const int inf = 1e18;

main() {
	int n, x;
	cin >> n >> x;
	vector<int> a(n);
	for(int i = 0; i < n ;i ++) {
		cin >> a[i];
	}
	sort(a.begin(), a.end());
	int delta = inf, ans = inf;
	for(int i = 0; i < n; i++) {
		for(int j = i + 1; j < n; j++) {
			if(abs(a[i] * a[j] - x) <= delta) {
				delta = abs(a[i] * a[j] - x);
				ans = min(ans, a[i] * a[j]);
			}
		}
	}
	cout << ans << endl;
}