#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
#define rep(i,q) for(int i = 0; q > i; i++)
int main(){
  int L,N;cin >> L >> N;
  vector<int> hi;
  int tmp;
  rep(i,N) cin >> tmp, hi.push_back(tmp);
  sort(hi.begin(),hi.end());
  int sm = 0;
  int ret = 0;
  rep(i,hi.size()){
    if(L > sm){
      ret++;
      sm += hi[i];
    } else {
      break;
    }
  }
  cout << ret - 1 << endl;
  return 0;
}