MediumNo. 2683
Neighboring Bitwise XOR — LeetCode 2683 Python Solution
- Pattern
- Bit Manipulation
- Topics
- Bit Manipulation, Array
- Reading time
- 2 min
- Source
- leetcode.com
The problem
A 0-indexed array derived with length n is derived by computing the bitwise XOR (⊕) of adjacent values in a binary array original of length n. Specifically, for each index i in the range [0, n - 1]: If i = n - 1, then derived[i] = original[i] ⊕ original[0].
Example
- Input
- derived = [1,1,0]
- Output
- true
- Explanation
- A valid original array that gives derived is [0,1,0].
Python solution
class Solution:
def doesValidArrayExist(self, derived: List[int]) -> bool:
return reduce(xor, derived) == 0Complexity
- 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 2683. Neighboring Bitwise XOR 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 2683. Neighboring Bitwise XOR?
LeetCode 2683. Neighboring Bitwise XOR is rated Medium on LeetCode.
- What is the time complexity of LeetCode 2683. Neighboring Bitwise XOR?
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 2683. Neighboring Bitwise XOR?
The Python solution on this page uses O(1) auxiliary space.
- What topics does LeetCode 2683. Neighboring Bitwise XOR cover?
LeetCode 2683. Neighboring Bitwise XOR is tagged Bit Manipulation and Array on LeetCode.