# Questions tagged [binary-matrix]

For challenges involving binary matrices. Binary matrices are matrices which only contain boolean (0 or 1) values. Operations on binary matrices are done with boolean algebra.

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### Advent Challenge 1: Help Santa unlock his present vault!

Next >> Descriptive Keywords (for searching): Make Two Matrices Equivalent, Overlap, Array, Find Challenge Santa has had a history of elves stealing presents from his vault in the past, so this ...
1k views

### Find highest scoring matrix without property X

This challenge is partly an algorithms challenge, partly an optimization challenge and partly simply a fastest code challenge. A cyclic matrix is fully specified by its first row ...
4k views

### Which tetromino is this?

Given an unsigned 16-bit integer N, your task is to determine whether its binary representation mapped inside a 4x4 matrix is matching a tetromino shape, and if so, which shape it is. Matrix Each ...
5k views

### Construct the Identity Matrix

The challenge is very simple. Given an integer input n, output the n x n identity matrix. The identity matrix is one that has <...
2k views

### Braille graphics

Cut a boolean matrix in 4x2 blocks and render them as Braille characters U+2800...U+28FF. ...
1k views

### The Binary Square Diagonal Sequence

The binary-square-diagonal-sequence is constructed as follows: Take the sequence of positive natural numbers: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, ... Convert each number to ...
6k views

### To find islands of 1 and 0 in matrix

Given a two dimensional matrix of 0 and 1s. Find the number of island for 1s and 0s where neighbours are only in the horizontal and vertical. ...
975 views

### Matrix property X revisited (or the Joy of X)

This challenge is partly an algorithms challenge, partly an optimization challenge and partly simply a fastest code challenge. A T matrix is fully specified by its first row ...
601 views

### Minimal taxicab distance map

Challenge description In taxicab metric, a distance between two points is defined as: Consider a matrix with only zeros and ones: ...
2k views

### Trim that distracting background off!

Isn't it annoying when you're taking a picture, but the background detracts from the actual substance of the image? I'd say it is. I need to know how much I should crop so that I get rid of this ...
782 views

### Binary Puzzle Solver

Introduction Rules of the puzzle: The puzzle Binary (also known as Takuzu or Subiku) is very simple to understand, and has only a few rules: Since the name of the game is binary it's pretty obvious, ...
2k views

### How much is my dice matrix worth?

Input A non-empty binary matrix consisting of 3x3 sub-matrices put side by side. Task Your task is to identify valid dice patterns (as described below) among the 3x3 sub-matrices. Each valid ...
666 views

### Print a specific value in this generated binary matrix

Suppose we define an infinite matrix M, on N^2 -> {0, 1} (where N starts from ...
495 views

### Print a specific value in the Wythoff matrix modulo 2

The Wythoff matrix is an infinite matrix consisting of the Grundy numbers of each square on a chessboard in Wythoff's game. Each entry in this matrix is equal to the smallest nonnegative number that ...