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func checkPowersOfThree(n int) bool {
    var power float64

    power =  16

    for n > 0 {
        if power < 0 {
            break
        }
        if n>=int(math.Pow(3, power)) {
            n = n - int(math.Pow(3, power))
        }

        power--
    }

    if n == 0 {
        return true
    }

    return false
}