#if defined(__GNUG__) && !defined(__clang__)
#include <bits/stdc++.h>
#endif

#define inf(T) (numeric_limits<T>::min())
#define sup(T) (numeric_limits<T>::max())
#define rep(i,n) for (int i = 0; i < (n); i++)
#define asc(c) (c).begin(), (c).end()
#define desc(c) (c).rbegin(), (c).rend()
#define mp(...) make_pair(__VA_ARGS__)
#define mt(...) make_tuple(__VA_ARGS__)

using namespace std;

using ll = long long;
using ld = long double;

template <class Key>          using uset = unordered_set<Key>;
template <class Key, class T> using umap = unordered_map<Key, T>;

int main()
{
  cin.tie(0);
  ios::sync_with_stdio(false);

  int l, n;
  cin >> l >> n;
  vector<int> ws(n);
  rep(i,n) cin >> ws[i];

  vector<vector<int>> dp(n + 1, vector<int>(n + 1, l + 1));
  rep(i, n) dp[i][0] = 0;
  rep(i, n) rep(j, i + 1) {
    dp[i + 1][j + 1] = min(dp[i][j + 1], dp[i][j] + ws[i]);
  }

  rep(i,n) {
    if (dp[n][n - i] <= l) {
      cout << n - i << endl;
      return 0;
    }
  }

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