#include <bits/stdc++.h>

using namespace std;

int main()
{
  int l;
  int n;
  cin >> l >> n;
  vector<int> v(n, 0);

  for (int i = 0; i < n; ++i)
    cin >> v[i];

  sort(v.begin(), v.end());
  int sum = 0, count = 0;

  for (int i = 0; i < n; ++i)
  {
    if (sum + v[i] > l)
      break;

    sum += v[i];
    count++;
  }

  cout << count << endl;
}