#include <iostream>
#include <algorithm>
#include <iomanip>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <numeric>
#include <bitset>
#include <cmath>
#include <limits>

static const int MOD = 1000000007;
using ll = long long;
using u32 = uint32_t;
using namespace std;

template<class T> constexpr T INF = ::numeric_limits<T>::max() / 32 * 15 + 208;

int main() {
    bitset<100001> dp;
    int d;
    cin >> d;
    while(d--){
        int a, b, n;
        cin >> a >> b >> n;
        vector<int> v(n);
        for (auto &&i : v) scanf("%d", &i);
        sort(v.begin(),v.end());
        vector<int> S(n+1);
        for (int i = 0; i < n; ++i) {
            S[i+1] = S[i] + v[i];
        }
        int ok = 0, ng = n+1;
        while(ng-ok > 1){
            int mid = (ok+ng)/2;
            if(S[mid] > a+b) {
                ng = mid;
                continue;
            }
            dp.reset();
            dp.set(0);
            for (int i = 0; i < mid; ++i) {
                dp |= (dp << v[i]);
            }
            int good = 0;
            for (int i = max(0, S[mid]-b); i <= a; ++i) {
                if(dp[i]) {
                    good = 1;
                    break;
                }
            }
            if(good) ok = mid;
            else ng = mid;
        }
        cout << ok << "\n";
    }
    return 0;
}