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How to Solve Build a Matrix With Conditions Problem
Master the Build a Matrix With Conditions LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
Phantom Code generates complete solutions and debugging hints that you can use while explaining your approach, so you stay calm and in control.
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Start Free for WindowsHard#2392
LeetCode ProblemBuild a Matrix With Conditions
You are given a positive integer k. You are also given: The two arrays contain integers from 1 to k. You have to build a k x k matrix that contains each of the numbers from 1 to k exactly once. The remaining cells should have the value 0. The matrix should also satisfy the following conditions: Return any matrix that satisfies the conditions. If no answer exists, return an empty matrix.
ArrayGraphTopological SortMatrix
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Problem Breakdown
Understanding the Build a Matrix With Conditions Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
You are given a positive integer k. You are also given: The two arrays contain integers from 1 to k. You have to build a k x k matrix that contains each of the numbers from 1 to k exactly once. The remaining cells should have the value 0. The matrix should also satisfy the following conditions: Return any matrix that satisfies the conditions. If no answer exists, return an empty matrix.
HardProblem #2392
LeetCodeBuild a Matrix With Conditions
Related Topics
ArrayGraphTopological SortMatrix
How Phantom Code Helps
Get real-time assistance for Build a Matrix With Conditions problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
k = 3, rowConditions = [[1,2],[3,2]], colConditions = [[2,1],[3,2]]
Output
[[3,0,0],[0,0,1],[0,2,0]]
# Example 2
Input
k = 3, rowConditions = [[1,2],[2,3],[3,1],[2,3]], colConditions = [[2,1]]
Output
[]
Constraints
2 <= k <= 400
1 <= rowConditions.length, colConditions.length <= 104
rowConditions[i].length == colConditions[i].length == 2
1 <= abovei, belowi, lefti, righti <= k
abovei != belowi
lefti != righti
How Phantom Code Helps with LeetCode Problems
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Solve Build a Matrix With Conditions — You are given a positive integer k. You are also given: The two arrays contain i...
Here's the optimal approach using Array:
def solve(input):
# Optimal O(n) solution
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Time: O(n) | Space: O(n)
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Undetectability Checklist
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Undetectability and technical details
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Frequently Asked Questions
Common questions about solving Build a Matrix With Conditions and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Build a Matrix With Conditions 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 Build a Matrix With Conditions?
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 Build a Matrix With Conditions?
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 Build a Matrix With Conditions 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 Build a Matrix With Conditions 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 Build a Matrix With Conditions 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 Build a Matrix With Conditions 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 Build a Matrix With Conditions 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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