//  Minimizing Coins

#include<bits/stdc++.h>

using namespace std;

int main() {
    int n, x;
    cin >> n >> x;
    vector<int> dp(x + 1, INT_MAX - 5);
    dp[0] = 0;
    for (int i{}; i < n; i++) {
        int c; cin >> c;
        for (int j = c; j <= x; j++) {
            if (j >= c) {
                dp[j] = min(dp[j - c] + 1, dp[j]);
            }
        }
    }
    if (dp[x] != INT_MAX - 5) cout << dp[x] << endl;
    else cout << -1 << endl;
    return 0;
}