Can you solve this real interview question? Power of Three - Given an integer n, return true if it is a power of three. Otherwise, return false. An integer n is a power of three, if there exists an integer x such that n == 3x. Example 1: Input: n
Reverse bits of a given 32 bits unsigned integer. For example, given input 43261596 (represented in binary as00000010100101000001111010011100), return 964176192 (represented in binary as00111001011110000010100101000000).注意:输入n=1时:转换成1 (00000000000000000000000000000001),然后输出:2147483648 (10000000000000000...
Leetcode力扣1418 手画图解版|点菜展示表 Display table of food order in restaurant 爱学习的饲养员 2442 1 Leetcode 231 2的幂 书森学院 65 1 Leetcode力扣239.滑动窗口最大值 丶mars_ 3481 3 Leetcode 231. Power of Two (Python) Myron_yoo 21 0 Leetcode刷题 2 两数相加 Add Two Numbers...
[LeetCode] Power of Two Given an integer, write a function to determine if it is a power of two. 这道题没啥难度。主要是搞清楚怎么来判断一个数是不是power of two。 最简单的方法就是一直除以2最后等于1。如果不能,那么都是false。 ......
三种解法的代码在 leetcode 网站的运行时间如下图: - 1、方法一 - 2、方法二 - 3、方法三 可见,第二种最好,第一种次之,第三种最差。 类似的题目还有 power of two, power of four,使用上述三种方法略加修改即可。但是在题目 power of four 时,由于 4 本身是 2 的平方,所以第二种方法会失效。这是...
LeetCode*326. Power of Three LeetCode题目链接 注意:凡是以英文出现的,都是题目提供的,包括答案代码里的前几行。 题目: 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? 解析: 这一题最开始的想......
leetcode.com/problems/power-of-three/ 2.1)采用循环 class Solution: def isPowerOfThree(self, n: int) -> bool: if not n: return False while n: if n==1: return True if n%3: return False n //=3 return True Runtime: 80 ms, faster than 52.08% of Python3 online submissions...
Can you solve this real interview question? Reordered Power of 2 - You are given an integer n. We reorder the digits in any order (including the original order) such that the leading digit is not zero. Return true if and only if we can do this so that t
Given an integer (signed 32 bits), write a function to check whether it is a power of 4. Example: Given num = 16, return true. Given num = 5, return false. Follow up: Could you solve it without loops/recursion? 大意: 给出一个数字(有符号32位),写一个函数来检查它是不是4的次方数...
leetcode231. Power of Two 题目要求 Given an integer, write a function to determine if it is a power of two. 判断一个整数是否是2的幂。 思路和代码 当我们从二进制的角度来看,这个题目就非常简单了。其实题目的要求等价于该整数对应的二进制数中,一共有几个1。该题目的难点在于考虑边界情况,比如-2...