https://leetcode.com/problems/power-of-three/
Given an integer, write a function to determine if it is a power of three.
Follow up: Could you do it without using any loop / recursion?
3的次方数没有显著的特点,最直接的方法就是不停地除以3&…
作者:桂。 时间:2017-09-19 19:41:40 链接:http://www.cnblogs.com/xingshansi/p/7553746.html 前言 MUSIC(Multiple Signal Classification)算法通常用来进行到达角(DOA,Direction of arriva…