class Solution { public: bool isPowerOfFour(int num) { if(num<=0) return false; else { int test = 0x55555555; int MaxPowerOfFour = 0x01<<30; return MaxPowerOfFour % num ? false:((test&num)==num?true:false); } } };
时间: 2024-08-10 15:04:53
class Solution { public: bool isPowerOfFour(int num) { if(num<=0) return false; else { int test = 0x55555555; int MaxPowerOfFour = 0x01<<30; return MaxPowerOfFour % num ? false:((test&num)==num?true:false); } } };