#define _USE_MATH_DEFINES
#include "bits/stdc++.h"
using namespace std;
#define FOR(i,j,k) for(int (i)=(j);(i)<(int)(k);++(i))
#define rep(i,j) FOR(i,0,j)
#define each(x,y) for(auto &(x):(y))
#define mp make_pair
#define MT make_tuple
#define all(x) (x).begin(),(x).end()
#define debug(x) cout<<#x<<": "<<(x)<<endl
#define smax(x,y) (x)=max((x),(y))
#define smin(x,y) (x)=min((x),(y))
#define MEM(x,y) memset((x),(y),sizeof (x))
#define sz(x) (int)(x).size()
#define RT return
using ll = long long;
using pii = pair<int, int>;
using vi = vector<int>;
using vll = vector<ll>;

const int MAX_N = 17;
int T, N, t[MAX_N], sm[1 << MAX_N], g[1 << MAX_N];

void solve() {
    cin >> T >> N;
    rep(i, N)cin >> t[i];

    rep(S, 1 << N) {
        g[S] = N;
        rep(i, N) if (S >> i & 1) sm[S] += t[i];
    }
    g[0] = 0;

    const int A = (1 << N) - 1;

    rep(S, 1 << N) {
        int U = A ^ S, V = U;
        do {
            if (sm[V] <= T) {
                smin(g[S | V], g[S] + 1);
            }
            V = (V - 1)&U;
        } while (U != V);
    }

    cout << g[A] << endl;
}

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	cout << fixed << setprecision(15);
	solve();
	return 0;
}