- Count Triplets

# 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 .

**Example**

There are and at indices and . Return .

**Function Description**

Complete the *countTriplets* function in the editor below.

countTriplets has the following parameter(s):

*int arr[n]:*an array of integers*int r*: the common ratio

**Returns**

*int:*the number of triplets

**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**

**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 , , , .