#include<stdio.h>
#include<stdlib.h>
int comp( const void * p, const void *q)
{
	return (*(int *)p - *(int *)q);
}

int main(void)
{
	int T,n,m,time =0,cout =0;
	int a[200];
	scanf("%d",&T);
	while(T--)
	{
		scanf("%d%d",&n,&m);
		for(int i = 0; i <m; ++i)
		{
			scanf("%d",&a[i]);
		}
		qsort(a,m,sizeof(int),comp);
		time = 0;
		for(int i = 0; time <= n&&i< m; ++i)
		{
			time = time +a[i];
			if(time <= n)
				cout++;
		}
		printf("%d\n",cout);
		cout=0;
		time=0;
	}
	return 0;
}