题目
Given a non-negative integer num, return the number of steps to reduce it to zero. If the current number is even, you have to divide it by 2, otherwise, you have to subtract 1 from it.
解题思路
按照题目要求模拟
代码
class Solution:
def numberOfSteps (self, num: int) -> int:
res = 0
while num:
num = num - 1 if num & 1 else num >> 1
res += 1
return res
