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

public class NumberBlock {

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		int L = s.nextInt(), N = s.nextInt(), sum = 0;
		
		int[] W = new int[N];
		for(int i = 0;i<N;i++){
			W[i] = s.nextInt();
		}
		s.close();
		Arrays.sort(W);
		int t=0;
		do{
			sum += W[t++];
		}while(sum <= L && t< N);
		if(sum > L){
			System.out.println(t-1);
		}else{
			System.out.println(t);
		}
	}

}