import java.io.*;
import java.util.*;

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 && total <= t; j++) {
                if ((i & (1 << j)) == 0) {
                    continue;
                }
                total += times[j];
            }
            if (total <= t) {
                dp[i] = 1;
            }
            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 String next() throws Exception {
        if (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
}