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How to Solve Maximum Building Height Problem

Master the Maximum Building Height 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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Hard#1840

LeetCode Problem

Maximum Building Height

You want to build n new buildings in a city. The new buildings will be built in a line and are labeled from 1 to n. However, there are city restrictions on the heights of the new buildings: Additionally, there are city restrictions on the maximum height of specific buildings. These restrictions are given as a 2D integer array restrictions where restrictions[i] = [idi, maxHeighti] indicates that building idi must have a height less than or equal to maxHeighti. It is guaranteed that each building will appear at most once in restrictions, and building 1 will not be in restrictions. Return the maximum possible height of the tallest building.

ArrayMathSorting

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Problem Breakdown

Understanding the Maximum Building Height Problem

Let's break down this LeetCode problem and understand what makes it challenging in interview settings.

Problem Statement

HardProblem #1840

LeetCode

Maximum Building Height

How Phantom Code Helps

Get real-time assistance for Maximum Building Height problems during coding interviews. Phantom Code provides instant solutions and explanations.

Examples

# Example 1

Input

n = 5, restrictions = [[2,1],[4,1]]

Output

# Example 2

Input

n = 6, restrictions = []

Output

# Example 3

Input

n = 10, restrictions = [[5,3],[2,5],[7,4],[10,3]]

Output

Constraints

2 <= n <= 109

0 <= restrictions.length <= min(n - 1, 105)

2 <= idi <= n

idi is unique.

0 <= maxHeighti <= 109

How Phantom Code Helps with LeetCode Problems

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Solve Maximum Building Height — You want to build n new buildings in a city. The new buildings will be built in ...

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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Undetectability Checklist

Run compatibility test before interviews

Use recommended Zoom version settings

Enable advanced screen capture options

Verify native desktop architecture

Test with screen recording software

Platform Compatibility

Zoom

Supported

Google Meet

Supported

HackerRank

Supported

CodeSignal

Supported

CoderPad

Supported

Teams

Supported

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Undetectability and technical details

Our native desktop architecture avoids common detection vectors used by browser extensions. We provide a clear checklist so you can run basic checks and confirm the app will be invisible.

Platform compatibility and limitations

We work with Zoom, HackerRank, CodeSignal, CoderPad and other web-based platforms. Check the compatibility note and request a browser link if a specific desktop app is unsupported.

Frequently Asked Questions

Common questions about solving Maximum Building Height and using Phantom Code during coding interviews.

How does Phantom Code help me solve coding problems like Maximum Building Height 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 Maximum Building Height?

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 Maximum Building Height?

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 Maximum Building Height 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 Maximum Building Height 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 Maximum Building Height 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 Maximum Building Height 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 Maximum Building Height 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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