#include "bits/stdc++.h"
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
const int INF = 1e9;
const ll LINF = 1e18;
template<class S,class T> ostream& operator << (ostream& out,const pair<S,T>& o){ out << "(" << o.first << "," << o.second << ")"; return out; }
template<class T> ostream& operator << (ostream& out,const vector<T> V){ for(int i = 0; i < V.size(); i++){ out << V[i]; if(i!=V.size()-1) out << " ";} return out; }
template<class T> ostream& operator << (ostream& out,const vector<vector<T> > Mat){ for(int i = 0; i < Mat.size(); i++) { if(i != 0) out << endl; out << Mat[i];} return out; }
template<class S,class T> ostream& operator << (ostream& out,const map<S,T> mp){ out << "{ "; for(auto it = mp.begin(); it != mp.end(); it++){ out << it->first << ":" << it->second; if(mp.size()-1 != distance(mp.begin(),it)) out << ", "; } out << " }"; return out; }

/*
 <url:>
 問題文============================================================
 =================================================================
 解説=============================================================
 ================================================================
 */

ll solve(){
    ll res = 0;
    
    ll T,N; cin >> T >> N;
    vector<ll> t(N); for(auto& in:t) cin >> in;
    vector<int> dp(1<<N,INF);
    dp[0] = 0;
    for(int i = 1; i <= (1<<N);i++){
        for(int j = i;; j = (j-1)&i){
            int pre = i&(~j);
            //cout << bitset<9>(i) << " " <<  bitset<9>(j) << " " <<  bitset<9>(pre) << endl;
            ll Time = 0;
            for(int k = 0; k < N;k++){
                if((j>>k)&1){
                    Time += t[k];
                }
            }
            if(Time <= T){
                dp[i] = min(dp[i],dp[pre]+1);
            }
            if(j == 0)break;
        }
    }
    res = dp[(1<<N)-1];
//    cout << dp << endl;
    return res;
}
int main(void) {
    cin.tie(0); ios_base::sync_with_stdio(false);
    cout << solve() << endl;
    return 0;
}