#include<stdio.h>
int main(void)
{
	int i,L,N,W[10001],W_h,j,ans=0,sum=0;	
	scanf("%d",&L);
	scanf("%d",&N);
	for(i=0;i<N;i++)
	{
		scanf("%d",&W[i]);
	}	
	for(j=0;j<N;j++)
	{
		for(i=0;i<(N-1);i++)
		{
			if(W[i]>W[i+1])
			{
				W_h = W[i];
				W[i] = W[i+1];
				W[i+1] = W_h;
			}
		}
	}
	while(sum<L)
	{
		sum = sum + W[ans];
		ans++;
	}
	if(ans<N)
	{
		printf("%d",ans-1);
	}
	else
	{
		printf("%d\n",N);
	}
	return 0;
}