#include <bits/stdc++.h>
using namespace std;
 
int main() {
    const auto next_int = []() { int num; cin >> num; return num; };
    auto n = next_int(), x = next_int(), inf = x+1;
    vector<int> min_coins(inf,inf);
    for (min_coins[0] = 0; n > 0; --n)
        for (auto c = next_int(), y = c; y <= x; ++y)
            min_coins[y] = min(min_coins[y],min_coins[y-c]+1);
    cout << (min_coins[x] == inf ? -1: min_coins[x]);
    return 0; }
 

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