d = int(input())


def calc(a,b,m,A):
    S = 0
    dp = [0] * (a + 1)
    dp[0] = 1
    A.sort()
    S = A[0]
    if S > a and S > b:
        return 0
    dp[S] = 1
    ans = 1
    for i in range(1,m):
        S += A[i]
        if S > a + b:
            return ans
        flag = False
        for k in range(a - A[i],-1,-1):
            dp[k + A[i]] |= dp[k]
        for k in range(S - b,a + 1):
            if dp[k]:
                flag = True
                break
        if flag:
            ans += 1
        else:
            return ans
    return m

for _ in range(d):
    a,b = map(int,input().split())
    m = int(input())
    A = list(map(int,input().split()))
    print(calc(a,b,m,A))