#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;

int main(){
  int l, n;
  std::cin >> l >> n;
  vector<int> w(n);
  for (int i = 0; i < n; i++) {
    std::cin >> w[i];
  }
  sort(w.begin(), w.end());
  int p = 0;
  while(l - w[p] > 0){
    l -= w[p];
    p++;
  }
  std::cout << p << std::endl;
  return 0;
}