Description
A farmer has a crop land. The land consists of stones (S) and holes (H) as illustrated in the following figure. Note that the crop land is surrounded by the stones(S), so no need to worry about that water may flooding outside th crop land.
The farmer decides to water his crops, so he pours some water through the hole into the land. Assume that the amount of water is infinite, and the water can move in the four directions: up, down, left, right. Please write a program to find out where the water would reach.
For example, you are given a coordinate (1,3) representing the entrance and a table representing the farmer’s land initially:
After the farmer pours water into the land, water floods throughout the holes of the land. Finally, a portion of the holes will be filled with water like the following table.
where W means the corresponding hole is filled with water.
Note that
1. This problem involves three files.
- function.h: Function definition of flooding.
- function.c: Function describe of flooding.
- main.c: A driver program to test your implementation.
You will be provided with main.c and function.h, and asked to implement function.c.
2. For OJ submission:
Step 1. Submit only your function.c into the submission block. (Please choose c compiler)
Step 2. Check the results and debug your program if necessary.
Hints:
function.h
main.c
Input
The first line has an integer N(1<=N<=100), which means the number of test cases.
For each case, the first line has four integers. The first and second integers R and C (3<=R, C<=500) represent the numbers of row and column of the land, respectively. The total number of elements in the land is thus R x C. The third integer Y (0<=Y<=R-1) means the row of the entrance. The forth integer X (0<=X<=C-1) means the column of the entrance. The coordinate of the entrance is thus (Y,X). The following R lines, each containing C characters, specify the elements of the farmer’s land.
Output
Print out all elements of the lands row-by-row, and there is a '\n' at the end of each line. The states of all lands should be separated by a new line character (\n).