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How to Solve Minimum Moves to Spread Stones Over Grid Problem
Master the Minimum Moves to Spread Stones Over Grid LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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Start Free for WindowsMedium#2850
LeetCode ProblemMinimum Moves to Spread Stones Over Grid
You are given a 0-indexed 2D integer matrix grid of size 3 * 3, representing the number of stones in each cell. The grid contains exactly 9 stones, and there can be multiple stones in a single cell. In one move, you can move a single stone from its current cell to any other cell if the two cells share a side. Return the minimum number of moves required to place one stone in each cell.
ArrayDynamic ProgrammingBreadth-First SearchMatrix
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Problem Breakdown
Understanding the Minimum Moves to Spread Stones Over Grid Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
You are given a 0-indexed 2D integer matrix grid of size 3 * 3, representing the number of stones in each cell. The grid contains exactly 9 stones, and there can be multiple stones in a single cell. In one move, you can move a single stone from its current cell to any other cell if the two cells share a side. Return the minimum number of moves required to place one stone in each cell.
MediumProblem #2850
LeetCodeMinimum Moves to Spread Stones Over Grid
Related Topics
ArrayDynamic ProgrammingBreadth-First SearchMatrix
How Phantom Code Helps
Get real-time assistance for Minimum Moves to Spread Stones Over Grid problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
grid = [[1,1,0],[1,1,1],[1,2,1]]
Output
3
# Example 2
Input
grid = [[1,3,0],[1,0,0],[1,0,3]]
Output
4
Constraints
grid.length == grid[i].length == 3
0 <= grid[i][j] <= 9
Sum of grid is equal to 9.
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Solve Minimum Moves to Spread Stones Over Grid — You are given a 0-indexed 2D integer matrix grid of size 3 * 3, representing the...
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 Moves to Spread Stones Over Grid and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Minimum Moves to Spread Stones Over Grid 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 Moves to Spread Stones Over Grid?
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 Moves to Spread Stones Over Grid?
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 Moves to Spread Stones Over Grid 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 Moves to Spread Stones Over Grid 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 Moves to Spread Stones Over Grid 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 Moves to Spread Stones Over Grid 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 Moves to Spread Stones Over Grid 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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