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How to Solve Count Ways to Group Overlapping Ranges Problem
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Start Free for WindowsMedium#2580
LeetCode ProblemCount Ways to Group Overlapping Ranges
You are given a 2D integer array ranges where ranges[i] = [starti, endi] denotes that all integers between starti and endi (both inclusive) are contained in the ith range. You are to split ranges into two (possibly empty) groups such that: Two ranges are said to be overlapping if there exists at least one integer that is present in both ranges. Return the total number of ways to split ranges into two groups. Since the answer may be very large, return it modulo 109 + 7.
ArraySorting
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Problem Breakdown
Understanding the Count Ways to Group Overlapping Ranges Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
You are given a 2D integer array ranges where ranges[i] = [starti, endi] denotes that all integers between starti and endi (both inclusive) are contained in the ith range. You are to split ranges into two (possibly empty) groups such that: Two ranges are said to be overlapping if there exists at least one integer that is present in both ranges. Return the total number of ways to split ranges into two groups. Since the answer may be very large, return it modulo 109 + 7.
MediumProblem #2580
LeetCodeCount Ways to Group Overlapping Ranges
Related Topics
ArraySorting
How Phantom Code Helps
Get real-time assistance for Count Ways to Group Overlapping Ranges problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
ranges = [[6,10],[5,15]]
Output
2
# Example 2
Input
ranges = [[1,3],[10,20],[2,5],[4,8]]
Output
4
Constraints
1 <= ranges.length <= 105
ranges[i].length == 2
0 <= starti <= endi <= 109
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Solve Count Ways to Group Overlapping Ranges — You are given a 2D integer array ranges where ranges[i] = [starti, endi] denotes...
Here's the optimal approach using Array:
def solve(input):
# Optimal O(n) solution
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Frequently Asked Questions
Common questions about solving Count Ways to Group Overlapping Ranges and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Count Ways to Group Overlapping Ranges 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 Count Ways to Group Overlapping Ranges?
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 Count Ways to Group Overlapping Ranges?
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 Count Ways to Group Overlapping Ranges 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 Count Ways to Group Overlapping Ranges 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 Count Ways to Group Overlapping Ranges 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 Count Ways to Group Overlapping Ranges 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 Count Ways to Group Overlapping Ranges 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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