#include <stdio.h>
int bubbleSort(int list[],int arraySize);
int main(){
	int m,n,i,T,sum,time;
	int a[101];
	sum = 0;
	time = 0;
	scanf("%d",&T);
	while(T--){
		scanf("%d%d",&n,&m);
		for(i = 0;i < m;i++)
			scanf("%d",&a[i]);
		bubbleSort(a,m);
		for(i = 0;i < m;i++){
			time += a[i];
			if(time <= n)
				sum++;
		}
		printf("%d\n",sum);
		sum = 0;
		time = 0;
	}
	return 0;
}
int bubbleSort(int list[101],int arraySize){
	int pass,i,temp;
	for(pass = 1;pass < arraySize;++pass){
		for(i = 0;i < arraySize - pass;++i){
			if(list[i] > list[i+1]){
				temp = list[i];
				list[i] = list[i+1];
				list[i+1] = temp;
			}
		}
	}
	return list[101];
}