LC-0810 Hard LeetCode

810. Chalkboard XOR Game

Array Math Bit Manipulation Brainteaser Game Theory

Read the full problem statement on LeetCode.

Difficulty: hard Acceptance: 63% Topics: Array, Math, Bit Manipulation, Brainteaser, Game Theory

Reading material

Arrays & Hashing 12 min Math & Geometry 12 min Bit Manipulation 10 min

Reference solution (spoiler · python)

# Time:  O(n)
# Space: O(1)

from operator import xor
from functools import reduce


class Solution(object):
    def xorGame(self, nums):
        """
        :type nums: List[int]
        :rtype: bool
        """
        return reduce(xor, nums) == 0 or \
            len(nums) % 2 == 0

Solution from kamyu104/LeetCode-Solutions · MIT