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How to Solve Smallest Range Covering Elements from K Lists Problem
Master the Smallest Range Covering Elements from K Lists LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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LeetCode ProblemSmallest Range Covering Elements from K Lists
You have k lists of sorted integers in non-decreasing order. Find the smallest range that includes at least one number from each of the k lists. We define the range [a, b] is smaller than range [c, d] if b - a < d - c or a < c if b - a == d - c.
ArrayHash TableGreedySliding WindowSortingHeap (Priority Queue)
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Problem Breakdown
Understanding the Smallest Range Covering Elements from K Lists Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
You have k lists of sorted integers in non-decreasing order. Find the smallest range that includes at least one number from each of the k lists. We define the range [a, b] is smaller than range [c, d] if b - a < d - c or a < c if b - a == d - c.
HardProblem #632
LeetCodeSmallest Range Covering Elements from K Lists
Related Topics
ArrayHash TableGreedySliding WindowSortingHeap (Priority Queue)
How Phantom Code Helps
Get real-time assistance for Smallest Range Covering Elements from K Lists problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
nums = [[4,10,15,24,26],[0,9,12,20],[5,18,22,30]]
Output
[20,24]
# Example 2
Input
nums = [[1,2,3],[1,2,3],[1,2,3]]
Output
[1,1]
Constraints
nums.length == k
1 <= k <= 3500
1 <= nums[i].length <= 50
-105 <= nums[i][j] <= 105
nums[i] is sorted in non-decreasing order.
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Solve Smallest Range Covering Elements from K Lists — You have k lists of sorted integers in non-decreasing order. Find the smallest r...
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def solve(input):
# Optimal O(n) solution
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Time: O(n) | Space: O(n)
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Frequently Asked Questions
Common questions about solving Smallest Range Covering Elements from K Lists and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Smallest Range Covering Elements from K Lists 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 Smallest Range Covering Elements from K Lists?
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 Smallest Range Covering Elements from K Lists?
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 Smallest Range Covering Elements from K Lists 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 Smallest Range Covering Elements from K Lists 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 Smallest Range Covering Elements from K Lists 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 Smallest Range Covering Elements from K Lists 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 Smallest Range Covering Elements from K Lists 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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