#include<bits/stdc++.h>
#define REP(i,n) for(int i=0;i<n;i++)
#define LOOP(i,x,n) for(int i=x;i<n;i++)
#define ALL(v) (v).begin(),(v).end()
#define PB push_back
#define MP make_pair
#define FIR first
#define UB upper_bound
#define LB lower_bound
#define int long long
using namespace std;
const int MOD=1000000007;
const int INF=1000000009;

signed main(){
  int l,n;
  cin>>l>>n;
  vector<int> w(n);
  REP(i,n)cin>>w[i];
  sort(ALL(w));
  int ans=0;
  REP(i,n){
    if(l-w[i]>0){
      ans++;
      l-=w[i];
    }
  }
  cout<<ans<<endl;
  return 0;
}