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How to Solve Cells with Odd Values in a Matrix Problem
Master the Cells with Odd Values in a Matrix LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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Start Free for WindowsEasy#1252
LeetCode ProblemCells with Odd Values in a Matrix
There is an m x n matrix that is initialized to all 0's. There is also a 2D array indices where each indices[i] = [ri, ci] represents a 0-indexed location to perform some increment operations on the matrix. For each location indices[i], do both of the following: Given m, n, and indices, return the number of odd-valued cells in the matrix after applying the increment to all locations in indices. Example 1: Example 2: Constraints: Follow up: Could you solve this in O(n + m + indices.length) time with only O(n + m) extra space?
ArrayMathSimulation
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Problem Breakdown
Understanding the Cells with Odd Values in a Matrix Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
There is an m x n matrix that is initialized to all 0's. There is also a 2D array indices where each indices[i] = [ri, ci] represents a 0-indexed location to perform some increment operations on the matrix. For each location indices[i], do both of the following: Given m, n, and indices, return the number of odd-valued cells in the matrix after applying the increment to all locations in indices. Example 1: Example 2: Constraints: Follow up: Could you solve this in O(n + m + indices.length) time with only O(n + m) extra space?
EasyProblem #1252
LeetCodeCells with Odd Values in a Matrix
Related Topics
ArrayMathSimulation
How Phantom Code Helps
Get real-time assistance for Cells with Odd Values in a Matrix problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
m = 2, n = 3, indices = [[0,1],[1,1]]
Output
6
# Example 2
Input
m = 2, n = 2, indices = [[1,1],[0,0]]
Output
0
Constraints
1 <= m, n <= 50
1 <= indices.length <= 100
0 <= ri < m
0 <= ci < n
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Solve Cells with Odd Values in a Matrix — There is an m x n matrix that is initialized to all 0's. There is also a 2D arra...
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 Cells with Odd Values in a Matrix and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Cells with Odd Values in a Matrix 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 Cells with Odd Values in a Matrix?
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 Cells with Odd Values in a Matrix?
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 Cells with Odd Values in a Matrix 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 Cells with Odd Values in a Matrix 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 Cells with Odd Values in a Matrix 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 Cells with Odd Values in a Matrix 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 Cells with Odd Values in a Matrix 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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