BITMAP - Bitmap
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:
Write a program which:
- reads the description of the bitmap from the standard input,
- for each pixel, computes the distance to the nearest white pixel,
- writes the results to the standard output.
The number of test cases t 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.
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.
Sample input: 1 3 4 0001 0011 0110 Sample output: 3 2 1 0 2 1 0 0 1 0 0 1
|Added by:||Piotr Łowiec|
|Cluster:||Cube (Intel Pentium G860 3GHz)|
|Languages:||All except: SCM chicken|
|Resource:||6th Polish Olympiad in Informatics, stage 2|
The input specification is ambiguous: "t test cases follow separated by an empty line"
Good concept recognition question
use bfs.and be care of the index of arrayLast edit: 2015-06-16 10:11:48
My first with dp using iteration...
"here 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." See the last part of the sentence, "at least one is white"
ok.. tell what is the output of
Can anyone help me with some test cases? I've tried many test cases but I am getting WA.
multisource bfs :))
" but at least one is white "
What if there are no white pixels in the bitmap, what should I print?