Xor

4000ms

262144K

Description:

John Doe has four arrays: a, b, k, and p. Each array consists of n integers. Elements of all arrays are indexed starting from 1. Array p is a permutation of integers 1 to n.

John invented a game for his friends and himself. Initially a player is given array a. The player must consecutively execute exactly u operations on a. You are permitted to execute the following operations:

Operation 1: For each $\text{[math]}$ change a_i into $\text{[math]}$ . Expression $\text{[math]}$ means applying the operation of a bitwise xor to numbers x and y. The given operation exists in all modern programming languages, for example, in language C++ and Java it is marked as "^", in Pascal — as "xor".
Operation 2: For each $\text{[math]}$ change a_i into a_{p_i} + r. When this operation is executed, all changes are made at the same time.

After all u operations are applied, the number of points the player gets is determined by the formula $\text{[math]}$ .

John wants to find out what maximum number of points a player can win in his game. Help him.

Input:

The first line contains space-separated integers n, u and r (1 ≤ n, u ≤ 30, 0 ≤ r ≤ 100) — the number of elements in each array, the number of operations and the number that describes one of the operations.

Each of the next four lines contains n space-separated integers — arrays a, b, k, p. The first line has array a, the second line has array b, the third line has array k and the fourth one has array p.

It is guaranteed that elements of arrays a and b are positive and do not exceed 10⁴ (1 ≤ a_i, b_i ≤ 10⁴), elements of array k do not exceed 10⁴ in the absolute value (|k| ≤ 10⁴) and p is a permutation of numbers from 1 to n.

Output:

On a single line print number s — the maximum number of points that a player can win in John's game.

Please, do not use the %lld specifier to read or write 64-bit integers in С++. It is preferred to use the cin, cout streams or the %I64d specifier.

Sample Input:

Sample Output:

Sample Input:

Sample Output:

Note:

In the first sample you should first apply the operation of the first type, then the operation of the second type.

Informação

Provedor Codeforces

Código CF193B