目录
🍕题目
231. 2 的幂
🍟代码
class Solution:
def isPowerOfTwo(self, n: int) -> bool:
return n > 0 and n & (n - 1) == 0
🍕题目
191. 位1的个数
🍟代码
class Solution:
def hammingWeight(self, n: int) -> int:
ret = sum(1 for i in range(32) if n & (1 << i))
return ret