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How to Solve Rectangle Area II Problem
Master the Rectangle Area II LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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Start Free for WindowsHard#850
LeetCode ProblemRectangle Area II
You are given a 2D array of axis-aligned rectangles. Each rectangle[i] = [xi1, yi1, xi2, yi2] denotes the ith rectangle where (xi1, yi1) are the coordinates of the bottom-left corner, and (xi2, yi2) are the coordinates of the top-right corner. Calculate the total area covered by all rectangles in the plane. Any area covered by two or more rectangles should only be counted once. Return the total area. Since the answer may be too large, return it modulo 109 + 7.
ArraySegment TreeLine SweepOrdered Set
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Problem Breakdown
Understanding the Rectangle Area II Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
You are given a 2D array of axis-aligned rectangles. Each rectangle[i] = [xi1, yi1, xi2, yi2] denotes the ith rectangle where (xi1, yi1) are the coordinates of the bottom-left corner, and (xi2, yi2) are the coordinates of the top-right corner. Calculate the total area covered by all rectangles in the plane. Any area covered by two or more rectangles should only be counted once. Return the total area. Since the answer may be too large, return it modulo 109 + 7.
HardProblem #850
LeetCodeRectangle Area II
Related Topics
ArraySegment TreeLine SweepOrdered Set
How Phantom Code Helps
Get real-time assistance for Rectangle Area II problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
rectangles = [[0,0,2,2],[1,0,2,3],[1,0,3,1]]
Output
6
# Example 2
Input
rectangles = [[0,0,1000000000,1000000000]]
Output
49
Constraints
1 <= rectangles.length <= 200
rectanges[i].length == 4
0 <= xi1, yi1, xi2, yi2 <= 109
xi1 <= xi2
yi1 <= yi2
All rectangles have non zero area.
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Solve Rectangle Area II — You are given a 2D array of axis-aligned rectangles. Each rectangle[i] = [xi1, y...
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 Rectangle Area II and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Rectangle Area II 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 Rectangle Area II?
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 Rectangle Area II?
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 Rectangle Area II 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 Rectangle Area II 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 Rectangle Area II 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 Rectangle Area II 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 Rectangle Area II 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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