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// @Title: 数值的整数次方 (数值的整数次方 LCOF)
// @Author: 15816537946@163.com
// @Date: 2022-02-21 22:27:32
// @Runtime: 0 ms
// @Memory: 1.9 MB
func myPow(x float64, n int) float64 {
    if n == 0 {
        return 1
    }
    if n == 1 {
        return x
    }
    if n <0 {
        x = 1/x
        n = -n
    }

    temp := myPow(x, n/2)
    if n%2 == 0 {
        return temp * temp
    }
    return x *temp * temp
}