Easy-题目69:342. Power of Four(增补2)
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题目原文:
Given an integer, write a function to determine if it is a power of four.
题目大意:
给出一个整数,判断是不是4的幂。
题目分析:
懒得写了,穷举。
源码:(language:cpp)
class Solution {public: bool isPowerOfFour(int n) { return (n==1||n==4||n==16||n==64||n==256||n==1024||n==4096||n==16384||n==65536||n==262144||n==1048576||n==4194304||n==16777216||n==67108864||n==268435456||n==1073741824); }};
成绩:
20ms
0 0
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