/**
 *   @FileName	a.cpp
 *   @Author	kanpurin
 *   @Created	2020.06.02 17:36:16
**/

#include "bits/stdc++.h" 
using namespace std; 
typedef long long ll;

int main() {
    int d;cin >> d;
    while(d--) {
        int n1,n2;cin >> n1 >> n2;
        int m;cin >> m;
        vector<bool> v(n1+1,false);
        v[0] = true;
        vector<int> a(m);
        for (int i = 0; i < m; i++) {
            cin >> a[i];
        }
        sort(a.begin(), a.end());
        ll sum = 0;
        int ans = 0;
        int now = 0;
        for (int i = 0; i < m; i++) {
            sum += a[i];
            for (int j = n1; j >= a[i]; j--) {
                v[j] = v[j] | v[j - a[i]];
                if (v[j]) {
                    now = max(now,j);
                }
            }
            if (sum - now <= n2) {
                ans = i + 1;
            } 
        }
        cout << ans << endl;
    }
    return 0;
}