#include <bits/stdc++.h>
using namespace std;
int main() {
    int t, n; cin >> t >> n;
    vector<int> v(n);
    for (int i = 0; i < n; i++) cin >> v[i];
    vector<int> dp((1 << n), 1e9);
    dp[0] = 0;
    for (int bit = 1; bit < (1 << n); bit++) {
        int total = 0;
        for (int i = 0; i < n; i++) {
            if (bit & (1 << i)) {
                total += v[i];
            }
        }
        if (total <= t) dp[bit] = 1;
    }
    int cnt = 0;
    for (int bit = 1; bit < (1 << n); bit++) {
        for (int i = bit; i > 0; i = (i-1) & bit) {
            dp[bit] = min(dp[bit], dp[i] + dp[bit^i]);
            cnt++;
        }
    }
    cout << dp[(1 << n) - 1] << endl;
}