#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;
 
int n1, n2;
vector<int> a;
 
vector<int> DP;
 
int n0,n_min,n1sa,n2sa;
 
bool solve(int sum,int first);
 
int main()
{
    int d,m;
    cin >> d;
    for (int i = 0; i < d; i++) {
        cin >> n1 >> n2;
        cin >> m;
        a.resize(m);
        for (int j = 0; j < m; j++) {
            cin >> a[j];
        }
        sort(a.begin(), a.end());
        n0 = n1 + n2;
        n_min = min(n1, n2);
        int ans;
        for (ans = 0; ans < a.size(); ans++) {
            if (a[ans] <= n0) {
                n0 -= a[ans];
            }else break;
        }
        if(n0>=n_min){
             cout<<ans<<endl;
             continue;
        }
        n1sa=n1-n0;
        n2sa=n2-n0;
        reverse(a.begin(), a.end());
        DP.assign(100010, 100);
        cout << ans - !solve(0, 0) << endl;
    }
    return 0;
}
 
bool solve(int sum,int first) {
	int tmp;
    for (int i = first; i < a.size(); i++) {
        tmp = sum + a[i];
        if ((tmp >= n1sa&&tmp <= n1) || (tmp >= n2sa&&tmp <= n2)) {
            return true;
        }
        else if (tmp > n_min) continue;
        if (DP[tmp] <= i) continue;
        else {
            DP[tmp] = i;
            if (solve(tmp,i+1)) return true;
        }
    }
    return false;
}