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How to Solve Minimum Domino Rotations For Equal Row Problem
Master the Minimum Domino Rotations For Equal Row LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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Start Free for WindowsMedium#1007
LeetCode ProblemMinimum Domino Rotations For Equal Row
In a row of dominoes, tops[i] and bottoms[i] represent the top and bottom halves of the ith domino. (A domino is a tile with two numbers from 1 to 6 - one on each half of the tile.) We may rotate the ith domino, so that tops[i] and bottoms[i] swap values. Return the minimum number of rotations so that all the values in tops are the same, or all the values in bottoms are the same. If it cannot be done, return -1.
ArrayGreedy
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Problem Breakdown
Understanding the Minimum Domino Rotations For Equal Row Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
In a row of dominoes, tops[i] and bottoms[i] represent the top and bottom halves of the ith domino. (A domino is a tile with two numbers from 1 to 6 - one on each half of the tile.) We may rotate the ith domino, so that tops[i] and bottoms[i] swap values. Return the minimum number of rotations so that all the values in tops are the same, or all the values in bottoms are the same. If it cannot be done, return -1.
MediumProblem #1007
LeetCodeMinimum Domino Rotations For Equal Row
Related Topics
ArrayGreedy
How Phantom Code Helps
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Examples
# Example 1
Input
tops = [2,1,2,4,2,2], bottoms = [5,2,6,2,3,2]
Output
2
# Example 2
Input
tops = [3,5,1,2,3], bottoms = [3,6,3,3,4]
Output
-1
Constraints
2 <= tops.length <= 2 * 104
bottoms.length == tops.length
1 <= tops[i], bottoms[i] <= 6
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Solve Minimum Domino Rotations For Equal Row — In a row of dominoes, tops[i] and bottoms[i] represent the top and bottom halves...
Here's the optimal approach using Array:
def solve(input):
# Optimal O(n) solution
return result
Time: O(n) | Space: O(n)
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Frequently Asked Questions
Common questions about solving Minimum Domino Rotations For Equal Row and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Minimum Domino Rotations For Equal Row during interviews?
Phantom Code generates complete solutions instantly with proper complexity analysis, letting you focus on explaining your approach and demonstrating problem-solving skills rather than getting stuck on implementation details during high-pressure situations.
What if the interviewer asks follow-up questions or modifications to problems like Minimum Domino Rotations For Equal Row?
Phantom Code adapts in real-time. Screenshot the modified problem or use audio mode to capture the interviewer's follow-up, and get an updated solution within seconds — including edge cases and optimizations.
Can Phantom Code help me communicate my solution for problems like Minimum Domino Rotations For Equal Row?
Yes. Phantom Code provides step-by-step approach explanations with 3 progressive thoughts, so you can walk through your solution naturally. It also provides time and space complexity analysis to discuss trade-offs.
How does Phantom Code assist with different programming languages for Minimum Domino Rotations For Equal Row type problems?
Phantom Code supports 11 programming languages including Python, Java, C++, JavaScript, TypeScript, Go, Rust, Ruby, Swift, Kotlin, and C#. Set your preferred language and get idiomatic solutions.
What coding mistakes does Phantom Code help me avoid during Minimum Domino Rotations For Equal Row interviews?
Phantom Code catches common mistakes like off-by-one errors, missing edge cases, incorrect base conditions, and suboptimal approaches. It provides clean, well-structured code that handles all edge cases.
Is Phantom Code detectable when solving problems like Minimum Domino Rotations For Equal Row during live interviews?
No. Phantom Code runs as an invisible desktop overlay that doesn't appear in screen shares, recordings, or proctoring software. It works with Zoom, HackerRank, CodeSignal, CoderPad, and all major platforms.
How does Phantom Code help when I'm struggling with Minimum Domino Rotations For Equal Row style questions under pressure?
The AI provides structured guidance: first the approach (what algorithm/data structure to use and why), then the implementation with clean code, and finally complexity analysis. This helps you think clearly even under pressure.
Does Phantom Code work for the coding platforms used in Minimum Domino Rotations For Equal Row interviews?
Yes. Phantom Code works with all major coding platforms including LeetCode, HackerRank, CodeSignal, CoderPad, HackerEarth, and any browser-based coding environment.
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