All Questions
Tagged with matrix programming-challenge
36 questions
3
votes
1
answer
412
views
Find number of ways to traverse matrix of 0's and 1's
I solved a Daily Coding Challenge, but i suspect my code could be optimised. The challenge is the following:
You are given an N by M matrix of 0s and 1s. Starting from the top left corner, how many ...
- 33
4
votes
0
answers
150
views
LeetCode 1632: Rank Transform of a Matrix in Rust
This is a problem-solving code for LeetCode 1632.
Given an \$m \times n\$ matrix, return a new matrix answer where
...
1
vote
1
answer
232
views
Exercism: Class representation of a matrix in Python
The task is to represent a Matrix as a class and to instantiate it from a string such as "1 2 3 4\n5 6 7 8\n9 8 7 6"
The class must provide methods for ...
2
votes
1
answer
78
views
R solution to max product in matrix for four adjacent numbers (Euler 11)
Background
This is solution to Problem 11 on Project Euler that is concerned with finding largest product of four adjacent numbers in the provided grid.
Other than solving the problem I was also ...
- 313
3
votes
1
answer
523
views
1
vote
1
answer
1k
views
Rotate matrix clockWise and counter clockWise
This code is a mix of the same question one time rotating to the right and one time to the left.
I tried to simplify the code since I'm struggling with all of the indexing here.
https://leetcode.com/...
- 5,443
3
votes
1
answer
205
views
LeetCode: Transpose Matrix C#
Please review performance
https://leetcode.com/problems/transpose-matrix/
Given a matrix A, return the transpose of A.
The transpose of a matrix is the matrix flipped over it's main
diagonal, ...
- 5,443
2
votes
1
answer
482
views
GeeksforGeeks: Rotate matrix by 90 degrees
Please review the code readability, I would like to have an easier to follow code.
Thanks
...
- 5,443
1
vote
2
answers
461
views
JavaScript Spiral Matrix Coding Challenge
A whiteboarding challenge: Given a 2D array (matrix) inputMatrix of integers, create a function spiralCopy that copies ...
- 865
12
votes
4
answers
16k
views
Python 3 function to rotate an image 90°
A coding challenge that rotates an image 90 degrees counterclockwise. The image is represented as an array matrix. I believe the time complexity is O(n2), but I'd like to know for sure, as well as any ...
- 865
8
votes
1
answer
2k
views
Codewars: N-dimensional Von Neumann Neighborhood in a matrix
Task:
For creating this challenge on Codewars I need a very performant
function that calculates Von Neumann Neighborhood in a N-dimensional
array. This function will be called about 2000 times
The ...
- 461
3
votes
2
answers
4k
views
Print concentric rectangular patterns
I am solving interview questions from here.
Problem : Print concentric rectangular pattern in a 2d matrix. The outermost rectangle is formed by A, then the next outermost is formed by A-1 and so on. ...
- 1,869
1
vote
3
answers
2k
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Calculate median of a matrix
I am solving interview questions from here.
Problem : Given a N cross M matrix in which each row is sorted, find the overall median of the matrix. Assume N*M is odd.
Note: No extra memory is ...
- 1,869
3
votes
1
answer
201
views
Project Euler Problem 11 in Rust: largest product of consecutive elements of 20x20 grid
Here is my solution to problem 11 on Project Euler. The goal was to find the largest product of any four numbers in consecutive line of any direction (vertical, horizontal, or diagonal). While my ...
- 243
2
votes
2
answers
2k
views
HackerRank - Queens Attack II - Java
The problem definition can already be found here. Given a chess board with dimensions n × n (where n is up to 100000) and the (r, c) positions of various obstacles, how many squares can a queen at a ...
- 1,587