import java.util.*; import java.io.*; public class Main { public static void main(String[] args) throws Exception { Scanner sc = new Scanner(); int t = sc.nextInt(); int n = sc.nextInt(); int[] times = new int[n]; for (int i = 0; i < n; i++) { times[i] = sc.nextInt(); } int[] dp = new int[1 << n]; Arrays.fill(dp, Integer.MAX_VALUE / 2); for (int i = 1; i < (1 << n); i++) { int total = 0; for (int j = 0; j < n; j++) { if ((i & (1 << j)) == 0) { continue; } total += times[j]; } if (total <= t) { dp[i] = 1; continue; } for (int j = i; j > 0; j = ((j - 1) & i)) { dp[i] = Math.min(dp[i], dp[j] + dp[i ^ j]); } } System.out.println(dp[(1 << n) - 1]); } } class Scanner { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); StringTokenizer st = new StringTokenizer(""); public Scanner() throws Exception { } public int nextInt() throws Exception { return Integer.parseInt(next()); } public long nextLong() throws Exception { return Long.parseLong(next()); } public double nextDouble() throws Exception { return Double.parseDouble(next()); } public String nextLine() throws Exception { return br.readLine(); } public String next() throws Exception { if (!st.hasMoreTokens()) { st = new StringTokenizer(br.readLine()); } return st.nextToken(); } }