SPIKES  Spiky Mazes
Jarmtin is interested in cultures and the history behind them. Of course this interest has a reason: as he studies the choivans’ past he discovers the hidden entrances of mazes he knows contain valuable information. However there is a catch: the mazes contain spiky traps! Jarmtin is quite the agile type, but there is a limit to everyone, thus he will only be able to avoid a number of traps. This motivates the question can he make it through the mazes?
Jarmtin is interested in cultures and the history behind them. Of course this interest has a reason: as he studies the choivans’ past he discovers the hidden entrances of mazes he knows contain valuable information. However there is a catch: the mazes contain spiky traps! Jarmtin is quite the agile type, but there is a limit to everyone, thus he will only be able to avoid a number of traps. This motivates the question can he make it through the mazes?
Input
The first line of a test case contains three integers n, m and j. n (2<=n<=40) the number of rows, m (2<=n<=40) the width of each row and j (0<=j<=20) the number of times Jarmtin can avoid spikes. Then n lines containing m characters; The character ‘x’ will be used for the place of the treasure, ‘@’ for an entrance (which is also an exit), ‘#’ for walls, ‘.’ for a safe walking tile and ‘s’ for spikes. Note that you cannot walk into walls and the maze is completely surrounded by walls outside what you can see. There is always at least one entrance/exit and always an x where the treasure is.
Output
You should output “SUCCESS” if Jarmtin can make it in and out alive, and “IMPOSSIBLE” if there is no way you can make it out alive.
Sample Input / Output
Example 1:
Input:
3 3 2
#@#
#s#
#x#
Output:
SUCCESS
Example 2:
Input:
4 4 3
####
@.s#
##.#
#xs#
Output:
IMPOSSIBLE
hide comments
maratha:
20180928 21:55:13
A must do problem for understanding backtracking in DFS. 

g_somani:
20180613 08:57:32
The problem is to find the entrance/exit which is at least spikedistance from the treasure. He will enter as well as exit from the same cell. 

karan_batra:
20170920 05:38:17
Weak test cases. 

kspoj:
20170729 18:29:12
This prob gave me some hope in backtracking :) Last edit: 20170729 18:38:37 

singhsauravsk:
20170523 06:38:24
@andrewfang_21


andrewfang_21:
20170326 12:42:02
This maze only contains one treasure or more? 

vengatesh15:
20170315 20:27:08
easy one AC in 1 go:) 

Xvamp999:
20161227 14:51:48
Simple DFS :) 

xalen:
20161201 06:56:38
Nice backtracking :) AC 

Sushovan Sen:
20161021 08:42:47
@k_a_singh:

Added by:  Laurens 
Date:  20130810 
Time limit:  1s 
Source limit:  50000B 
Memory limit:  1536MB 
Cluster:  Cube (Intel G860) 
Languages:  All except: ASM64 
Resource:  Self created problem 