Bitmap Exercise

Problem

There is given a rectangular bitmap of size n*m. Each pixel of the bitmap is either white or black, but at least one is white. The pixel in i-th line and j-th column is called the pixel (i,j). The distance between two pixels p1=(i1,j1) and p2=(i2,j2) is defined as d(p1,p2)=|i1-i2|+|j1-j2|. Write a program which:

• reads the description of the bitmap from the standard input;
• for each pixel, computes the distance to the nearest white;
• writes the results to the standard output.

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Input

The number of test cases t (1≤t≤1000) is in the first line of input, then t test cases follow separated by an empty line. In the first line of each test case there is a pair of integer numbers n, m separated by a single space, 1<=n <=182, 1<=m<=182. In each of the following n lines of the test case exactly one zero-one word of length m, the description of one line of the bitmap, is written. On the j-th position in the line (i+1), 1 <= i <= n, 1 <= j <= m, is '1' if, and only if the pixel (i,j) is white.

1
3 4
0001
0011
0110

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Output

In the i-th line for each test case, 1<=i<=n, there should be written m integers f(i,1),...,f(i,m) separated by single spaces, where f(i,j) is the distance from the pixel (i,j) to the nearest white pixel.

3210
2100
1001

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Description

The application has 3 main layer config, reader and calculator. Config is responsible for parse and validate environment variables from .env file Reader is responsible for read and validate input file with given Config parameters Calculator layer is responsible for calculate the nearest white pixel in the bitmap, uses Breadth First Search algorithm. After execution final result shows up in the terminal.

Configuration

Before start program you have to define environment file(.env) in the root folder, also you can rename .env.example file to .env with default parameters

Key	Default	Description
BITMAP_MIN_SIZE	1	minimum amount of bitmap size
BITMAP_MAX_SIZE	182	maximum amount of bitmap size
CASE_MIN_SIZE	1	minimum amount of case
CASE_MAX_SIZE	1000	maximum amount of case
INPUT_FILE_PATH	./input	input file location

Setup

install all dependencies via npm

npm install

after installation ready to run program.

npm run start