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  1. Count Triplets

Count Triplets

You are given an array and you need to find number of tripets of indices such that the elements at those indices are in geometric progression for a given common ratio and .

For example, . If , we have and at indices and .

Function Description

Complete the countTriplets function in the editor below. It should return the number of triplets forming a geometric progression for a given as an integer.

countTriplets has the following parameter(s):

  • arr: an array of integers
  • r: an integer, the common ratio

Input Format

The first line contains two space-separated integers and , the size of and the common ratio.
The next line contains space-seperated integers .

Constraints

Output Format

Return the count of triplets that form a geometric progression.

Sample Input 0

4 2
1 2 2 4

Sample Output 0

2

Explanation 0

There are triplets in satisfying our criteria, whose indices are and

Sample Input 1

6 3
1 3 9 9 27 81

Sample Output 1

6

Explanation 1

The triplets satisfying are index , , , , and .

Sample Input 2

5 5
1 5 5 25 125

Sample Output 2

4

Explanation 2

The triplets satisfying are index , , , .