#include <iostream>

using namespace std;

int n, x;
int niza[105];
int dp[1000003];
int coins(int x_left) {
    if(x_left == 0) {
        return 0;
    }
    if(dp[x_left] != -1) {
        return dp[x_left];
    }
    int result = 2e9;
    for(int i = 0; i < n; i++) {
        if(x_left - niza[i] >= 0) {
            result = min(result, coins(x_left - niza[i]) + 1);
        }
    }
    return dp[x_left] = result;
}
int main()
{
    cin >> n >> x;
    for(int i = 0; i <= x; i++) {
        dp[i] = -1;
    }
    for(int i = 0; i < n; i++) {
        cin >> niza[i];
    }
    if(coins(x) == 2e9) {
        cout << -1 << endl;
    }
   else  cout << coins(x) << endl;
    return 0;
}