#include <bits/stdc++.h>
using namespace std;
const int INF = 2147483647;
const int MOD = 1048576;

int main(void) {
  int L, N;
  cin >> L >> N;
  vector<int> W(N);
  for (int i = 0; i < N; i++) {
    cin >> W[i];
  }

  sort(W.begin(), W.end());

  int i = 0, quantity = 0;
  while (quantity < L) {
    quantity += W[i];
    ++i;
  }

  if (quantity > L) --i;

  cout << i << endl;
  return 0;
}