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How to Solve Count Cells in Overlapping Horizontal and Vertical Substrings Problem
Master the Count Cells in Overlapping Horizontal and Vertical Substrings LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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Start Free for WindowsMedium#3529
LeetCode ProblemCount Cells in Overlapping Horizontal and Vertical Substrings
You are given an m x n matrix grid consisting of characters and a string pattern. A horizontal substring is a contiguous sequence of characters read from left to right. If the end of a row is reached before the substring is complete, it wraps to the first column of the next row and continues as needed. You do not wrap from the bottom row back to the top. A vertical substring is a contiguous sequence of characters read from top to bottom. If the bottom of a column is reached before the substring is complete, it wraps to the first row of the next column and continues as needed. You do not wrap from the last column back to the first. Count the number of cells in the matrix that satisfy the following condition: Return the count of these cells.
ArrayStringRolling HashString MatchingMatrixHash Function
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Problem Breakdown
Understanding the Count Cells in Overlapping Horizontal and Vertical Substrings 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 grid consisting of characters and a string pattern. A horizontal substring is a contiguous sequence of characters read from left to right. If the end of a row is reached before the substring is complete, it wraps to the first column of the next row and continues as needed. You do not wrap from the bottom row back to the top. A vertical substring is a contiguous sequence of characters read from top to bottom. If the bottom of a column is reached before the substring is complete, it wraps to the first row of the next column and continues as needed. You do not wrap from the last column back to the first. Count the number of cells in the matrix that satisfy the following condition: Return the count of these cells.
MediumProblem #3529
LeetCodeCount Cells in Overlapping Horizontal and Vertical Substrings
Related Topics
ArrayStringRolling HashString MatchingMatrixHash Function
How Phantom Code Helps
Get real-time assistance for Count Cells in Overlapping Horizontal and Vertical Substrings problems during coding interviews. Phantom Code provides instant solutions and explanations.
Examples
# Example 1
Input
grid = [["a","a","c","c"],["b","b","b","c"],["a","a","b","a"],["c","a","a","c"],["a","a","b","a"]], pattern = "abaca"
Output
1
# Example 2
Input
grid = [["c","a","a","a"],["a","a","b","a"],["b","b","a","a"],["a","a","b","a"]], pattern = "aba"
Output
4
# Example 3
Input
grid = [["a"]], pattern = "a"
Output
1
Constraints
m == grid.length
n == grid[i].length
1 <= m, n <= 1000
1 <= m * n <= 105
1 <= pattern.length <= m * n
grid and pattern consist of only lowercase English letters.
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Solve Count Cells in Overlapping Horizontal and Vertical Substrings — You are given an m x n matrix grid consisting of characters and a string pattern...
Here's the optimal approach using Array:
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 Count Cells in Overlapping Horizontal and Vertical Substrings and using Phantom Code during coding interviews.
How does Phantom Code help me solve coding problems like Count Cells in Overlapping Horizontal and Vertical Substrings 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 Cells in Overlapping Horizontal and Vertical Substrings?
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 Cells in Overlapping Horizontal and Vertical Substrings?
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 Cells in Overlapping Horizontal and Vertical Substrings 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 Cells in Overlapping Horizontal and Vertical Substrings 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 Cells in Overlapping Horizontal and Vertical Substrings 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 Cells in Overlapping Horizontal and Vertical Substrings 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 Cells in Overlapping Horizontal and Vertical Substrings 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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