def countTriplets(arr, r):
    seconds = {}
    thirds = {}
    count = 0

    for i in arr:
        
        if i in thirds:
            count += thirds[i]

        if i in seconds:
            if i * r in thirds:
                thirds[i * r] += seconds[i]
            else:
                thirds[i * r] = seconds[i]

        if i * r in seconds:
            seconds[i * r] += 1
        else:
            seconds[i * r] = 1

    return count