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Results tagged with matrix
Search options questions only
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user 100664
This tag is for challenges involving matrices. A matrix, also known as a 2D array, is a list of numbers arranged in a rectangle with rows and columns.
22
votes
2
answers
1k
views
Minecraft piston pushing
Your challenge
Take as input a 5x5 matrix or similar, containing one piston at the bottom, and output the result of the single piston pushing upwards, as 5x6. …
- 44.2k
18
votes
8
answers
1k
views
Drop some boxes
Input can be as a matrix, text, whatever.
The input will always be a solid block - nothing like
BB
AAA
Will ever be inputted, so you don't have to parse spaces / empty values. …
- 44.2k
16
votes
10
answers
824
views
Remove submatrices
Given two integer matrices a and b, your challenge is to replace any occurences of b in a with a matrix of the same size filled with 0s. …
- 44.2k
16
votes
11
answers
2k
views
Flood fill by distance
containing obstacles, flood fill it like so from the top left hand corner and output a corresponding matrix. … You may take any two consistent values in the matrix instead of 1 and 0, and you may choose any value to represent obstacles. Distances may be 0 or 1-indexed. …
- 44.2k
16
votes
17
answers
840
views
Square chunk my matrix
Your challenge is to write a function/program that takes a matrix of integers m and a number n as input and:
Splits m into n by n chunks
Replaces each chunk with the most common value in that chunk ( … Outputs the resulting matrix.
Note: You can take either the size of a single chunk, or the number of chunks to a side. …
- 44.2k