import java.util.Scanner;
import java.util.Arrays;

class Block{
	public static void main(String args[]){
		Scanner s = new Scanner(System.in);
		int L = s.nextInt();
		int N = s.nextInt();
		int W[] = new int[N];
		for(int i = 0; i < N; i++){
			W[i] = s.nextInt();
		}
		Arrays.sort(W);
		
		int sum = 0;
		for(int j = 0; j < N; j++){
			sum += W[j];
			if(sum == L){
				System.out.println(j + 1);
				System.exit(0);
			}else if(sum > L){
				System.out.println(j);
				System.exit(0);
			}
		}
		System.out.println(N);
	}
}