All Questions
96 questions
13
votes
5
answers
2k
views
solve n*m matrix processing in less time
I want to solve a problem in less time complexity. Here are the details:
Given an n*m matrix, n rows and m columns. Initially, the matrix is empty filled with 0s.
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- 377
3
votes
1
answer
187
views
Snail matrix in Java - version III (generalizing)
Once again, in the previous version,
Alexander Ivanchenko helped me with his awesome answer.
Now, I have improved the toString() and, also, generalized the class ...
- 31.3k
5
votes
1
answer
341
views
Snail matrix in Java - version II
(This post is the continuation of Snail matrix in Java. Also, this post has an continuation.)
As previously, a snail matrix is any square matrix \$M_n = \mathbb{N}^{n \times n}\$ with cell elements ...
- 31.3k
6
votes
2
answers
915
views
Snail matrix in Java
(This post has an continuation: Snail matrix in Java - version II.)
Inspired by this post, I decided to solve that problem in Java. The idea is to decide on an \$n \in \mathbb{N}\$, create a square ...
- 31.3k
5
votes
2
answers
542
views
Generic matrix library in Java
I have this repository. The most important source files follow.
com.github.coderodde.math.linear.matrix.AbstractMatrix.java:
...
- 31.3k
2
votes
1
answer
109
views
Multidimensional array in Java
I have this multidimensional array that generalizes vectors and matrices:
com.github.coderodde.util.MultidimensionalArray.java:
...
- 31.3k
4
votes
3
answers
721
views
Immutable matrix class with mathematical methods
This was a homework assignment for a data structures course. The goal was to implement a given interface and the assignment was auto-graded by a system that ran some validation tests. Sadly I did not ...
- 197
0
votes
1
answer
133
views
Given a matrix return true if it contains the Identity matrix (by recursion)
I need to write recursive static method with given 3 parameters
the method will return true if the sub matrix with the size of (int size) which the
left corner is mat[x][x] is the identity matrix
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- 23
4
votes
4
answers
1k
views
Make surrounding elements zero in a matrix, when you find a zero value
Please can you suggest a better / Optimized logic or code for the question. It has been asked that when you find a zero value in a matrix, make that element the sum of its upper, lower ,left, right ...
- 139
0
votes
1
answer
1k
views
Find Passable Lanes in Rows and Columns
I have implemented the following question and looking forward for the reviews.
Question Explanation :
We have a two-dimensional board game involving snakes. The board has two types of squares on it: +...
- 930
0
votes
2
answers
202
views
Given a 2d matrix with chars find the target string
I am looking for a simpler implementation of the following question.
Could it get better?
I am expecting the new solution via DFS again. Thanks.
OA: Given a 2d matrix with chars and a target string.
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- 930
0
votes
1
answer
317
views
Iterating 2d array
I have implemented a MatrixIt class to traverse a 2D array. Is it possible to make the code clearer and shorter?
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- 3
3
votes
2
answers
431
views
Array To Matrix
I made a method that takes an array and converts it to a matrix, given that it is a valid conversion. However, there is some redundant code in the beginning and I thought maybe you could help me? I ...
- 31
0
votes
2
answers
102
views
Better way to write this program in java?
I am new to writing java code and I would like to improve my skills. I would like someone to review and critic me on where I can improve on. Here is a small program I wrote in java about matrices and ...
- 11
3
votes
1
answer
331
views
Finding shortest path in matrix
Given an N x N matrix of positive integers, I need to find the shortest path from the first cell of matrix to the last cell of matrix. I can move exactly x steps from any cell, where x is the value of ...
- 31