#include<stdio.h>
#include<string.h>
int main(){
	int T,n,m,i,num,time,temp,pass,total,q;
	int ss[200];
	scanf("%d",&T);
	while(T--){
		scanf("%d %d",&n,&m);
		num=0;
		total=0;
		for(i=0;i<m;++i){
			scanf("%d",&time);
			ss[i]=time;
		}
		for(pass=1;pass<m;++pass){
			for(i=0;i<m-pass;++i){
				if(ss[i]>ss[i+1]){
					temp=ss[i];
					ss[i]=ss[i+1];
					ss[i+1]=temp;
				}
			}
		}
		for(q=0;q<m;++q){
			total+=ss[q];
			if(total<=n)
				num+=1;
		}
		printf("%d\n",num);
	}
	return 0;
}