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How to Solve Find the Kth Smallest Sum of a Matrix With Sorted Rows Problem
Master the Find the Kth Smallest Sum of a Matrix With Sorted Rows LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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LeetCode ProblemFind the Kth Smallest Sum of a Matrix With Sorted Rows
You are given an m x n matrix mat that has its rows sorted in non-decreasing order and an integer k. You are allowed to choose exactly one element from each row to form an array. Return the kth smallest array sum among all possible arrays.
ArrayBinary SearchHeap (Priority Queue)Matrix
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Problem Breakdown
Understanding the Find the Kth Smallest Sum of a Matrix With Sorted Rows Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
You are given an m x n matrix mat that has its rows sorted in non-decreasing order and an integer k. You are allowed to choose exactly one element from each row to form an array. Return the kth smallest array sum among all possible arrays.
HardProblem #1439
LeetCodeFind the Kth Smallest Sum of a Matrix With Sorted Rows
Related Topics
ArrayBinary SearchHeap (Priority Queue)Matrix
How Phantom Code Helps
Get real-time assistance for Find the Kth Smallest Sum of a Matrix With Sorted Rows problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
mat = [[1,3,11],[2,4,6]], k = 5
Output
7
# Example 2
Input
mat = [[1,3,11],[2,4,6]], k = 9
Output
17
# Example 3
Input
mat = [[1,10,10],[1,4,5],[2,3,6]], k = 7
Output
9
Constraints
m == mat.length
n == mat.length[i]
1 <= m, n <= 40
1 <= mat[i][j] <= 5000
1 <= k <= min(200, nm)
mat[i] is a non-decreasing array.
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Solve Find the Kth Smallest Sum of a Matrix With Sorted Rows — You are given an m x n matrix mat that has its rows sorted in non-decreasing ord...
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def solve(input):
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Frequently Asked Questions
Common questions about solving Find the Kth Smallest Sum of a Matrix With Sorted Rows and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Find the Kth Smallest Sum of a Matrix With Sorted Rows 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 Find the Kth Smallest Sum of a Matrix With Sorted Rows?
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 Find the Kth Smallest Sum of a Matrix With Sorted Rows?
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 Find the Kth Smallest Sum of a Matrix With Sorted Rows 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 Find the Kth Smallest Sum of a Matrix With Sorted Rows 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 Find the Kth Smallest Sum of a Matrix With Sorted Rows 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 Find the Kth Smallest Sum of a Matrix With Sorted Rows 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 Find the Kth Smallest Sum of a Matrix With Sorted Rows 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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