#include<stdio.h>
#include<stdlib.h>
#define MAX_SIZE 1000
int comp(const void *p,const void *q)
{
	return (*(int *)p-*(int *)q);
}
int main ()
{
	int t;
	scanf("%d",&t);
	while(t--)
	{
		int time,number;
		scanf("%d%d",&time,&number);
		int a[MAX_SIZE],i;
		for(i=0;i<number;++i)
			scanf("%d",&a[i]);
		qsort(a,number,sizeof(int),comp);
		//for(i=0;i<number;++i)
		//	printf("%d ",a[i]);
		//printf("\n");
		int total=0;
		i=0;
		while(total<=time&&i<number)
		{
			total+=a[i];
			//printf("%d %d %d \n",i,a[i],total);
			i++;
		}
		if(total>time)
			printf("%d\n",i-1);
		else
			printf("%d\n",i);
	}
	return 0;
}