p326

admin 11月 12, 2020 0

LeetCode p326 Power of Three 题解

Given an integer, write a function to determine if it is a power of three.

题意：

输入一个int型数判断他是否是3的n次方

1162261467 = 3^19, 3^20 比 int 大

 
public class  {
    public boolean isPowerOfThree(int n) {
        return ( n>0 &&  1162261467%n==0);
    }
}