#include <bits/stdc++.h>

using namespace std;

using int64 = long long;

bool uku_chan[1 << 17];
int dp[1 << 17];

int rec(int bit) {
  if(dp[bit]) return dp[bit];
  if(uku_chan[bit]) return 1;
  int ret = 1 << 30;
  for(int i = bit & (bit - 1); i > 0; i = (i - 1) & bit) ret = min(ret, rec(bit ^ i) + rec(i));
  return dp[bit] = ret;
}

int main() {
  int T, N, t[17];

  cin >> T >> N;
  for(int i = 0; i < N; i++) cin >> t[i];
  for(int i = 0; i < 1 << N; i++) {
    int sum = 0;
    for(int j = 0; j < N; j++) if((i >> j) & 1) sum += t[j];
    if(sum <= T) uku_chan[i] = true;
  }
  cout << rec((1 << N) - 1) << endl;
}