#include<stdio.h>
#include<stdlib.h>
#include<string.h>


#define N_MAX 10000


int l, n;
int w[N_MAX+1];


int cmp(const void *pa, const void *pb)
{
	const int *a, *b;

	a=pa;
	b=pb;
	if(*a<*b) return -1;
	return *a>*b;
}


int main(void)
{
	int i, s;

	while(scanf("%d%d", &l, &n)==2)
	{
		for(i=0;i<n;i++)
		{
			scanf("%d", &w[i]);
		}
		qsort(w, n, sizeof(w[0]), cmp);
		for(i=s=0;i<n;i++)
		{
			if(s+w[i]>l) break;
			s+=w[i];
		}
		printf("%d\n", i);
	}

	return 0;
}