EasyNo. 2980
Check if Bitwise OR Has Trailing Zeros — LeetCode 2980 Python Solution
- Pattern
- Bit Manipulation
- Topics
- Bit Manipulation, Array
- Reading time
- 2 min
- Source
- leetcode.com
The problem
You are given an array of positive integers nums. You have to check if it is possible to select two or more elements in the array such that the bitwise OR of the selected elements has at least one trailing zero in its binary representation.
Example
- Input
- nums = [1,2,3,4,5]
- Output
- true
- Explanation
- If we select the elements 2 and 4, their bitwise OR is 6, which has the binary representation "110" with one trailing zero.
Python solution
class Solution:
def hasTrailingZeros(self, nums: List[int]) -> bool:
return sum(x & 1 ^ 1 for x in nums) >= 2Complexity
- Time
- O(n)where n is the length of the array
- Space · auxiliary
- O(1)
Pattern: Bit Manipulation
Use XOR, masks and the low-bit trick to replace whole data structures with an integer. LeetCode 2980. Check if Bitwise OR Has Trailing Zeros is filed here on both counts: the reference solution below belongs to the algorithm family this hub collects, and LeetCode tags it Bit Manipulation.
The bit manipulation guide has the Python template for the pattern and the 194 LeetCode problems that use it.
Related problems
| No. | Problem | Difficulty |
|---|---|---|
| 0136 | Single Number | Easy |
| 0137 | Single Number II | Medium |
| 0260 | Single Number III | Medium |
| 0287 | Find the Duplicate Number | Medium |
| 0318 | Maximum Product of Word Lengths | Medium |
| 0393 | UTF-8 Validation | Medium |
Frequently asked questions
- How hard is LeetCode 2980. Check if Bitwise OR Has Trailing Zeros?
LeetCode 2980. Check if Bitwise OR Has Trailing Zeros is rated Easy on LeetCode.
- What is the time complexity of LeetCode 2980. Check if Bitwise OR Has Trailing Zeros?
The Python solution on this page runs in O(n), where n is the length of the array.
- What is the space complexity of LeetCode 2980. Check if Bitwise OR Has Trailing Zeros?
The Python solution on this page uses O(1) auxiliary space.
- What topics does LeetCode 2980. Check if Bitwise OR Has Trailing Zeros cover?
LeetCode 2980. Check if Bitwise OR Has Trailing Zeros is tagged Bit Manipulation and Array on LeetCode.