A14781. Make Them Equal

You have an array of integers $a$ of size $n$ . Initially, all elements of the array are equal to $1$ . You can perform the following operation: choose two integers $i$ ( $1 \le i \le n$ ) and $x$ ( $x > 0$ ), and then increase the value of $a_i$ by $\left\lfloor\frac{a_i}{x}\right\rfloor$ (i.e. make $a_i = a_i + \left\lfloor\frac{a_i}{x}\right\rfloor$ ).

After performing all operations, you will receive $c_i$ coins for all such $i$ that $a_i = b_i$ .

Your task is to determine the maximum number of coins that you can receive by performing no more than $k$ operations.

The first line contains a single integer $t$ ( $1 \le t \le 100$ ) — the number of test cases.

The first line of each test case contains two integers $n$ and $k$ ( $1 \le n \le 10^3; 0 \le k \le 10^6$ ) — the size of the array and the maximum number of operations, respectively.

The second line contains $n$ integers $b_1, b_2, \dots, b_n$ ( $1 \le b_i \le 10^3$ ).

The third line contains $n$ integers $c_1, c_2, \dots, c_n$ ( $1 \le c_i \le 10^6$ ).

The sum of $n$ over all test cases does not exceed $10^3$ .

For each test case, print one integer — the maximum number of coins that you can get by performing no more than $k$ operations.