Please subscribe to the official Codeforces channel in Telegram via the link: https://t.me/codeforces_official.
×

No tag edit access

C. Square Subsets

time limit per test

4 secondsmemory limit per test

256 megabytesinput

standard inputoutput

standard outputPetya was late for the lesson too. The teacher gave him an additional task. For some array *a* Petya should find the number of different ways to select non-empty subset of elements from it in such a way that their product is equal to a square of some integer.

Two ways are considered different if sets of indexes of elements chosen by these ways are different.

Since the answer can be very large, you should find the answer modulo 10^{9} + 7.

Input

First line contains one integer *n* (1 ≤ *n* ≤ 10^{5}) — the number of elements in the array.

Second line contains *n* integers *a*_{i} (1 ≤ *a*_{i} ≤ 70) — the elements of the array.

Output

Print one integer — the number of different ways to choose some elements so that their product is a square of a certain integer modulo 10^{9} + 7.

Examples

Input

4

1 1 1 1

Output

15

Input

4

2 2 2 2

Output

7

Input

5

1 2 4 5 8

Output

7

Note

In first sample product of elements chosen by any way is 1 and 1 = 1^{2}. So the answer is 2^{4} - 1 = 15.

In second sample there are six different ways to choose elements so that their product is 4, and only one way so that their product is 16. So the answer is 6 + 1 = 7.

Codeforces (c) Copyright 2010-2018 Mike Mirzayanov

The only programming contests Web 2.0 platform

Server time: Dec/11/2018 20:07:20 (d1).

Desktop version, switch to mobile version.

Supported by

User lists

Name |
---|