import sys
input = sys.stdin.readline

t = int(input())
inf = 10 ** 18
for _ in range(t):
    n1, n2 = map(int, input().split())
    m = int(input())
    A = sorted(list(map(int, input().split())))
    pre = [-inf] * (n1 + 1)
    pre[0] = 0
    now = 0
    ans = -1
    for a in A:
        dp = [-inf] * (n1 + 1)
        for i in range(n1 + 1):
            if i + a <= n1:
                dp[i + a] = max(dp[i + a], pre[i] + 1)
            if now - i + a <= n2:
                dp[i] = max(dp[i], pre[i] + 1)
        ans = max(ans, max(dp))
        now += a
        dp, pre = pre, dp

    print(ans) if ans != -1 else print(0)