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Divisible Sum Pairs
You are given an array of
number of

integers,

pairs where

and

, and a positive integer,
+

is divisible by

. Find and print the

.

Input Format
The first line contains space-separated integers, and , respectively.
The second line contains space-separated integers describing the respective values of
Constraints

Output Format
Print the number of

pairs where

Sample Input
63
132612

Sample Output
5

Explanation
Here are the

valid pairs:

and

+

is evenly divisible by

.

.



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