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How to Solve Chalkboard XOR Game Problem
Master the Chalkboard XOR Game LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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Hard#810
LeetCode ProblemChalkboard XOR Game
You are given an array of integers nums represents the numbers written on a chalkboard. Alice and Bob take turns erasing exactly one number from the chalkboard, with Alice starting first. If erasing a number causes the bitwise XOR of all the elements of the chalkboard to become 0, then that player loses. The bitwise XOR of one element is that element itself, and the bitwise XOR of no elements is 0. Also, if any player starts their turn with the bitwise XOR of all the elements of the chalkboard equal to 0, then that player wins. Return true if and only if Alice wins the game, assuming both players play optimally.
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Problem Breakdown
Understanding the Chalkboard XOR Game Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
You are given an array of integers nums represents the numbers written on a chalkboard. Alice and Bob take turns erasing exactly one number from the chalkboard, with Alice starting first. If erasing a number causes the bitwise XOR of all the elements of the chalkboard to become 0, then that player loses. The bitwise XOR of one element is that element itself, and the bitwise XOR of no elements is 0. Also, if any player starts their turn with the bitwise XOR of all the elements of the chalkboard equal to 0, then that player wins. Return true if and only if Alice wins the game, assuming both players play optimally.
HardProblem #810
LeetCodeChalkboard XOR Game
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How PhantomCodeAI Helps
Get real-time assistance for Chalkboard XOR Game problems during coding interviews. PhantomCodeAI provides instant solutions and explanations.
Examples
# Example 1
Input
nums = [1,1,2]
Output
false
# Example 2
Input
nums = [0,1]
Output
true
# Example 3
Input
nums = [1,2,3]
Output
true
Constraints
1 <= nums.length <= 1000
0 <= nums[i] < 216
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Solve Chalkboard XOR Game — You are given an array of integers nums represents the numbers written on a chal...
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def solve(input):
# Optimal O(n) solution
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Time: O(n) | Space: O(n)
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Frequently Asked Questions
Common questions about solving Chalkboard XOR Game and using PhantomCodeAI during coding interviews.
How does PhantomCodeAI help with LeetCode problems during a coding interview?
PhantomCodeAI reads the problem from a screenshot or listens to it via audio, then generates a complete solution with a step-by-step approach and time/space complexity, so you can focus on explaining your reasoning rather than getting stuck on implementation.
Which programming languages does PhantomCodeAI support?
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Does PhantomCodeAI work with HackerRank, CodeSignal, and CoderPad?
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Can PhantomCodeAI handle follow-up questions and modifications?
Yes. Capture the modified problem by screenshot or audio and get an updated solution within seconds, including new edge cases and optimizations.
Is PhantomCodeAI detectable during live interviews?
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Should I still practice these problems on my own first?
Yes. The most durable preparation is solving problems unaided first, then using AI afterward to review your approach, complexity, and missed edge cases — use it to debrief and learn, not to skip the reps.
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