Hacker Rank "Division Sum pairs" solution

Question :---

You are given an array of

integers,

, and a positive integer,

. Find and print the number of

pairs where

and

is divisible by

For example,

and

. Our three pairs meeting the criteria are

and

Function Description

Complete the divisibleSumPairs function in the editor below. It should return the integer count of pairs meeting the criteria.

divisibleSumPairs has the following parameter(s):

n: the integer length of array
ar: an array of integers
k: the integer to divide the pair sum by

Input Format

The first line contains

space-separated integers,

and

.
The second line contains

space-separated integers describing the values of

Constraints

Output Format

Print the number of

pairs where

and

is evenly divisible by

Sample Input

6 3
1 3 2 6 1 2

Sample Output

Explanation

Here are the

valid pairs when

Solution : -

<?php

/* Write your PHP code here */

$ar = array(1,3,2,6,1,2);

$k = 3;

$n = 6;

$count = 0;

$sum = 0;

for($i=0;$i<$n-1;$i++){

for($j=$i+1;$j<$n;$j++){

$sum = $ar[$i] + $ar[$j];

if($sum % $k == 0){

$count++;

}

echo $count;

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