#include "bits/stdc++.h"
using namespace std;

int main() {
  int L, N; cin >> L >> N;
  int W[10010];

  for(int i = 0; i < N; ++i) cin >> W[i];
  sort(W, W + N);

  int cnt = 0;
  for(int i = 0; i < N; ++i) {
    if((L - W[i]) < 0) break;
    L -= W[i];
    cnt++;
  }

  cout << cnt << endl;
}