import java.util.*;

class No5_Yukicoder {
	
	public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		int L = sc.nextInt();
		int N = sc.nextInt();
		int[] W = new int[N];
		for(int i=0; i<N; i++) W[i] = sc.nextInt();
		Arrays.sort(W);
		int work = 0;
		int ans = 0;
		while(ans < N && (work+=W[ans]) <= L) {
			ans++;
		}
		System.out.println(ans);
		
	}
	
}