Algorithm 版 (精华区)
发信人: Lerry (想不开·撞树), 信区: Algorithm
标 题: IOI'94 - Day 1 - Problem 2: The Castle
发信站: 哈工大紫丁香 (2002年03月29日13:24:43 星期五), 站内信件
IOI'94 - Day 1 - Problem 2: The Castle
1 2 3 4 5 6 7
#############################
1 # | # | # | | #
#####---#####---#---#####---#
2 # # | # # # # #
#---#####---#####---#####---#
3 # | | # # # # #
#---#########---#####---#---#
4 # -># | | | | # #
############################# (Figure 1)
# = Wall
| = No wall
- = No wall
-> = It points to the wall to remove according to the example output.
----------------------------------------------------------------------------
----
Figure 1 shows the map of a castle. Write a program that calculates
how many rooms the castle has
how big the largest room is
which wall to remove from the castle to make as large a room as possible.
The castle is divided into m * n (m<=50, n<=50) square modules. Each such mo
dule can have between zero and four walls.
Input Data
The map is stored in the INPUT.TXT file in the form of numbers, one for each
module.
The file starts with the number of modules in the north-south direction and
the number of modules in the east-west direction.
In the following lines each module is described by a number (0<=p<=15). This
number is the sum of: 1 (= wall to the west), 2 (= wall to the north), 4 (=
wall to the east), 8 (= wall to the south). Inner walls are defined twice;
a wall to the south in module 1,1 is also indicated as a wall to the north i
n module 2,1.
The castle always has at least two rooms.
INPUT.TXT for our example:
4
7
11 6 11 6 3 10 6
7 9 6 13 5 15 5
1 10 12 7 13 7 5
13 11 10 8 10 12 13
Output Data
In the OUTPUT.TXT file, the following are written on three lines: First the
number of rooms, then the area of the largest room (counted in modules) and
a suggestion of which wall to remove (first the row and then the column of t
he module next to the wall and finally the compass direction that points to
the wall). In our example ("4 1 E" is one of several possibilities, you need
only produce one):
5
9
4 1 E
--
不在乎天长地久,就怕你从来没有!
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