#include <iostream>
#include <string>
#include <cstdio>
#include <algorithm>
#include <vector>
using namespace std;
#define rep(i,n) for(int i=0;i<(n);i++)

int main(void){
	int d; cin >> d;
	while(d > 0){
		int n1, n2; cin >> n1 >> n2;
		int m; cin >> m;
		vector<int> a(m);
		rep(i, m) cin >> a[i];
		sort(a.begin(), a.end());
		int mi = min(n1, n2);
		int ma = max(n1, n2);
		int cnt = 0, ans = 0;
		while(mi > 0){
			mi -= a[cnt];
			if(mi >= 0){
				ans++; cnt++;
			}
		}
		while(ma > 0){
			ma -= a[cnt];
			if(ma >= 0){
				ans++; cnt++;
			}
		}
	
		printf("%d\n", ans);
		d--;
	}
}