A New Growth Industry
Time Limit: 1 Second Memory Limit: 32768 KB
A biologist experimenting with DNA modification of bacteria has found a way
to make bacterial colonies sensitive to the
surrounding population density. By changing the DNA, he is able to "program"
the bacteria to respond to the varying densities in their immediate neighborhood.
The culture dish is a square, divided into 400 smaller squares (20x20). Population
in each small square is measured on a four point scale (from 0 to 3). The DNA
information is represented as an array D, indexed from 0 to 15, of integer values
and is interpreted as follows:
In any given culture dish square, let K be the sum of that square's density
and the densities of the four squares immediately to the left, right, above
and below that square (squares outside the dish are considered to have density
0). Then, by the next day, that dish square's density will change by D[K] (which
may be a positive, negative, or zero value). The total density cannot, however,
exceed 3 nor drop below 0.
Now, clearly, some DNA programs cause all the bacteria to die off (e.g., [-3,
-3, ..., -3]). Others result in immediate population explosions (e.g., [3,3,3,
..., 3]), and others are just plain boring (e.g., [0, 0, ... 0]). The biologist
is interested in how some of the less obvious DNA programs might behave.
Write a program to simulate the culture growth, reading in the number of days
to be simulated, the DNA rules, and the initial population densities of the
dish.
Input
Input to this program consists of three parts:
1. The first line will contain a single integer denoting the number of days to be simulated.
2. The second line will contain the DNA rule D as 16 integer values, ordered from D[0] to D[15], separated from one another by one or more blanks. Each integer will be in the range -3...3, inclusive.
3. The remaining twenty lines of input will describe the initial population density in the culture dish. Each line describes one row of squares in the culture dish, and will contain 20 integers in the range 0...3, separated from one another by 1 or more blanks.
Output
The program will produce exactly 20 lines of output, describing the population
densities in the culture dish at the end of the simulation. Each line represents
a row of squares in the culture dish, and will consist of 20 characters, plus
the usual end-of-line terminator.
Each character will represent the population density at a single dish square,
as follows:
No other characters may appear in the output.
This problem contains multiple test cases!
The first line of a multiple input is an integer N, then a blank line followed by N input blocks. Each input block is in the format indicated in the problem description. There is a blank line between input blocks.
The output format consists of N output blocks. There is a blank line between output blocks.
Sample Input
1 2 0 1 1 1 2 1 0 -1 -1 -1 -2 -2 -3 -3 -3 -3 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Sample Output
##!................. #!.................. !................... .................... .................... .................... .................... .........!.......... ........!#!......... .......!#X#!........ ........!#!......... .........!.......... .................... .................... .................... .................... .................... .................... .................... ....................Submit
Source: Mid-Atlantic USA 2001