package q50

func myPow(x float64, n int) float64 {
	neg := n < 0
	if neg {
		n = -n
	}

	var ret float64 = 1
	for n > 0 {
		v, p := x, 1
		for p*2 < n {
			p *= 2
			v *= v
		}
		n -= p
		ret *= v
	}
	if neg {
		return 1 / ret
	}
	return ret
}

var _ = myPow