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How to Solve Maximum Length of Pair Chain Problem
Master the Maximum Length of Pair Chain LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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Start Free for WindowsMedium#646
LeetCode ProblemMaximum Length of Pair Chain
You are given an array of n pairs pairs where pairs[i] = [lefti, righti] and lefti < righti. A pair p2 = [c, d] follows a pair p1 = [a, b] if b < c. A chain of pairs can be formed in this fashion. Return the length longest chain which can be formed. You do not need to use up all the given intervals. You can select pairs in any order.
ArrayDynamic ProgrammingGreedySorting
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Problem Breakdown
Understanding the Maximum Length of Pair Chain Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
You are given an array of n pairs pairs where pairs[i] = [lefti, righti] and lefti < righti. A pair p2 = [c, d] follows a pair p1 = [a, b] if b < c. A chain of pairs can be formed in this fashion. Return the length longest chain which can be formed. You do not need to use up all the given intervals. You can select pairs in any order.
MediumProblem #646
LeetCodeMaximum Length of Pair Chain
Related Topics
ArrayDynamic ProgrammingGreedySorting
How Phantom Code Helps
Get real-time assistance for Maximum Length of Pair Chain problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
pairs = [[1,2],[2,3],[3,4]]
Output
2
# Example 2
Input
pairs = [[1,2],[7,8],[4,5]]
Output
3
Constraints
n == pairs.length
1 <= n <= 1000
-1000 <= lefti < righti <= 1000
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Solve Maximum Length of Pair Chain — You are given an array of n pairs pairs where pairs[i] = [lefti, righti] and lef...
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 Maximum Length of Pair Chain and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Maximum Length of Pair Chain 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 Length of Pair Chain?
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 Length of Pair Chain?
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 Length of Pair Chain 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 Length of Pair Chain 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 Length of Pair Chain 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 Length of Pair Chain 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 Length of Pair Chain 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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