ABCPATH - ABC Path

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You will be given a 2-dimensional grid of letters. Find the length of the longest path of consecutive letters, starting at 'A'. Paths can step from one letter in the grid to any adjacent letter (horizontally, vertically, or diagonally).

For example, in the following grid, there are several paths from 'A' to 'D', but none from 'A' to 'E':

ABC

One such path is:

path

Input

Each test case will start with a line contains two integers H, W the height and width of the grid respectively 1 <= H, W <= 50. Then H lines follow each of W uppercase letters only. Input terminates with H = 0 and W = 0.

Output

For each test case print “Case C: X” without quotes where C is the case number starting with 1 and X is the solution.

Example

Sample Input:
4 3
ABE
CFG
BDH
ABC
0 0

Sample Output:
Case 1: 4

hide comments
killer_knight: 2019-10-18 11:46:05

be careful of garbage values if you are using 1 based indexing..costed me 3 wa :(

remembermeonce: 2019-09-28 00:02:33

@andyy143: your code output give so much blank space firstly you have to check your code on some input on some offline ide then you saw it show so much blank space. Remove these bugs then your code definitely accepted.

ishancosmos25: 2019-09-24 15:52:35

Good DFS!!

ishancosmos25: 2019-09-24 15:27:58

No image. LOL :-), if there is any admin, please solve this issue, how could we practice????

shim1998: 2019-09-17 23:12:53

there's no image
almost impossible to look at the question now lol

nikhil_sarda: 2019-09-02 08:41:58

Don't forget that the sequence must start from 'A'.
Hint:
Simply use recursion+memoization.

md_meraj1319: 2019-08-26 20:22:51

my code gives runtime error anyone suggests me why they give run time error.

abdelrahmanad: 2019-08-12 08:20:54

mohaimin66: thank u so much bro : )

aryan29: 2019-08-01 21:45:32

Seems like easy dfs to me at first but accepted after 3rte and 4wa

Last edit: 2019-08-01 23:40:58
sanket17: 2019-07-16 19:09:58

Don't forget to write Case costed me 2WA


Added by:Ali Arous
Date:2011-11-05
Time limit:0.458s
Source limit:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)
Languages:All except: ASM64
Resource:FCIS Local Contest 2012